diff --git a/homeassistant/components/mqtt/__init__.py b/homeassistant/components/mqtt/__init__.py
index 098099f0a03..58c99aa7c00 100644
--- a/homeassistant/components/mqtt/__init__.py
+++ b/homeassistant/components/mqtt/__init__.py
@@ -19,6 +19,7 @@ from homeassistant import config_entries
 from homeassistant.components import websocket_api
 from homeassistant.const import (
     CONF_CLIENT_ID,
+    CONF_DISCOVERY,
     CONF_PASSWORD,
     CONF_PAYLOAD,
     CONF_PORT,
@@ -28,7 +29,6 @@ from homeassistant.const import (
     EVENT_HOMEASSISTANT_STARTED,
     EVENT_HOMEASSISTANT_STOP,
 )
-from homeassistant.const import CONF_UNIQUE_ID  # noqa: F401
 from homeassistant.core import CoreState, Event, HassJob, ServiceCall, callback
 from homeassistant.exceptions import HomeAssistantError, Unauthorized
 from homeassistant.helpers import config_validation as cv, event, template
@@ -48,7 +48,6 @@ from .const import (
     ATTR_TOPIC,
     CONF_BIRTH_MESSAGE,
     CONF_BROKER,
-    CONF_DISCOVERY,
     CONF_QOS,
     CONF_RETAIN,
     CONF_STATE_TOPIC,
@@ -1053,7 +1052,6 @@ async def websocket_subscribe(hass, connection, msg):
 @callback
 def async_subscribe_connection_status(hass, connection_status_callback):
     """Subscribe to MQTT connection changes."""
-
     connection_status_callback_job = HassJob(connection_status_callback)
 
     async def connected():
diff --git a/homeassistant/components/mqtt/alarm_control_panel.py b/homeassistant/components/mqtt/alarm_control_panel.py
index 38fec57607e..2f2ba06d6d7 100644
--- a/homeassistant/components/mqtt/alarm_control_panel.py
+++ b/homeassistant/components/mqtt/alarm_control_panel.py
@@ -110,7 +110,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT alarm control panel dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/binary_sensor.py b/homeassistant/components/mqtt/binary_sensor.py
index d965401cef4..b9fb297cd5c 100644
--- a/homeassistant/components/mqtt/binary_sensor.py
+++ b/homeassistant/components/mqtt/binary_sensor.py
@@ -78,7 +78,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT binary sensor dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
@@ -214,7 +213,6 @@ class MqttBinarySensor(MqttEntity, BinarySensorEntity):
     @callback
     def _value_is_expired(self, *_):
         """Triggered when value is expired."""
-
         self._expiration_trigger = None
         self._expired = True
 
diff --git a/homeassistant/components/mqtt/camera.py b/homeassistant/components/mqtt/camera.py
index 21fcb9276dd..684e41214fe 100644
--- a/homeassistant/components/mqtt/camera.py
+++ b/homeassistant/components/mqtt/camera.py
@@ -52,7 +52,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT camera dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/climate.py b/homeassistant/components/mqtt/climate.py
index 15c7c916eeb..ede39103791 100644
--- a/homeassistant/components/mqtt/climate.py
+++ b/homeassistant/components/mqtt/climate.py
@@ -38,6 +38,8 @@ from homeassistant.const import (
     ATTR_TEMPERATURE,
     CONF_DEVICE,
     CONF_NAME,
+    CONF_PAYLOAD_OFF,
+    CONF_PAYLOAD_ON,
     CONF_TEMPERATURE_UNIT,
     CONF_UNIQUE_ID,
     CONF_VALUE_TEMPLATE,
@@ -98,8 +100,6 @@ CONF_MODE_COMMAND_TOPIC = "mode_command_topic"
 CONF_MODE_LIST = "modes"
 CONF_MODE_STATE_TEMPLATE = "mode_state_template"
 CONF_MODE_STATE_TOPIC = "mode_state_topic"
-CONF_PAYLOAD_OFF = "payload_off"
-CONF_PAYLOAD_ON = "payload_on"
 CONF_POWER_COMMAND_TOPIC = "power_command_topic"
 CONF_POWER_STATE_TEMPLATE = "power_state_template"
 CONF_POWER_STATE_TOPIC = "power_state_topic"
@@ -274,7 +274,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT climate device dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/config_flow.py b/homeassistant/components/mqtt/config_flow.py
index 5c4016437a6..c71541b58b0 100644
--- a/homeassistant/components/mqtt/config_flow.py
+++ b/homeassistant/components/mqtt/config_flow.py
@@ -7,6 +7,7 @@ import voluptuous as vol
 
 from homeassistant import config_entries
 from homeassistant.const import (
+    CONF_DISCOVERY,
     CONF_HOST,
     CONF_PASSWORD,
     CONF_PAYLOAD,
@@ -22,7 +23,6 @@ from .const import (
     ATTR_TOPIC,
     CONF_BIRTH_MESSAGE,
     CONF_BROKER,
-    CONF_DISCOVERY,
     CONF_WILL_MESSAGE,
     DATA_MQTT_CONFIG,
     DEFAULT_BIRTH,
diff --git a/homeassistant/components/mqtt/const.py b/homeassistant/components/mqtt/const.py
index 3e56ab6caf9..6c334eca311 100644
--- a/homeassistant/components/mqtt/const.py
+++ b/homeassistant/components/mqtt/const.py
@@ -11,7 +11,6 @@ ATTR_TOPIC = "topic"
 
 CONF_BROKER = "broker"
 CONF_BIRTH_MESSAGE = "birth_message"
-CONF_DISCOVERY = "discovery"
 CONF_QOS = ATTR_QOS
 CONF_RETAIN = ATTR_RETAIN
 CONF_STATE_TOPIC = "state_topic"
diff --git a/homeassistant/components/mqtt/cover.py b/homeassistant/components/mqtt/cover.py
index 4b428027a4d..54ef6cfb539 100644
--- a/homeassistant/components/mqtt/cover.py
+++ b/homeassistant/components/mqtt/cover.py
@@ -207,7 +207,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT cover dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/device_tracker/schema_discovery.py b/homeassistant/components/mqtt/device_tracker/schema_discovery.py
index 8b51b9fac0e..296f66889b3 100644
--- a/homeassistant/components/mqtt/device_tracker/schema_discovery.py
+++ b/homeassistant/components/mqtt/device_tracker/schema_discovery.py
@@ -59,7 +59,6 @@ PLATFORM_SCHEMA_DISCOVERY = (
 
 async def async_setup_entry_from_discovery(hass, config_entry, async_add_entities):
     """Set up MQTT device tracker dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/fan.py b/homeassistant/components/mqtt/fan.py
index f96180b0982..ef3ecffc0e0 100644
--- a/homeassistant/components/mqtt/fan.py
+++ b/homeassistant/components/mqtt/fan.py
@@ -122,7 +122,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT fan dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/light/__init__.py b/homeassistant/components/mqtt/light/__init__.py
index e780332d093..72c438df812 100644
--- a/homeassistant/components/mqtt/light/__init__.py
+++ b/homeassistant/components/mqtt/light/__init__.py
@@ -43,7 +43,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT light dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/light/schema_json.py b/homeassistant/components/mqtt/light/schema_json.py
index 489b424f4eb..8ec5c29db62 100644
--- a/homeassistant/components/mqtt/light/schema_json.py
+++ b/homeassistant/components/mqtt/light/schema_json.py
@@ -28,6 +28,7 @@ from homeassistant.const import (
     CONF_COLOR_TEMP,
     CONF_DEVICE,
     CONF_EFFECT,
+    CONF_HS,
     CONF_NAME,
     CONF_OPTIMISTIC,
     CONF_RGB,
@@ -75,7 +76,6 @@ CONF_EFFECT_LIST = "effect_list"
 
 CONF_FLASH_TIME_LONG = "flash_time_long"
 CONF_FLASH_TIME_SHORT = "flash_time_short"
-CONF_HS = "hs"
 
 CONF_MAX_MIREDS = "max_mireds"
 CONF_MIN_MIREDS = "min_mireds"
diff --git a/homeassistant/components/mqtt/light/schema_template.py b/homeassistant/components/mqtt/light/schema_template.py
index e696e99552e..1f4421205e0 100644
--- a/homeassistant/components/mqtt/light/schema_template.py
+++ b/homeassistant/components/mqtt/light/schema_template.py
@@ -24,6 +24,7 @@ from homeassistant.const import (
     CONF_DEVICE,
     CONF_NAME,
     CONF_OPTIMISTIC,
+    CONF_STATE_TEMPLATE,
     CONF_UNIQUE_ID,
     STATE_OFF,
     STATE_ON,
@@ -62,7 +63,6 @@ CONF_GREEN_TEMPLATE = "green_template"
 CONF_MAX_MIREDS = "max_mireds"
 CONF_MIN_MIREDS = "min_mireds"
 CONF_RED_TEMPLATE = "red_template"
-CONF_STATE_TEMPLATE = "state_template"
 CONF_WHITE_VALUE_TEMPLATE = "white_value_template"
 
 PLATFORM_SCHEMA_TEMPLATE = (
diff --git a/homeassistant/components/mqtt/lock.py b/homeassistant/components/mqtt/lock.py
index b08f8f8bb43..408bc07b9d9 100644
--- a/homeassistant/components/mqtt/lock.py
+++ b/homeassistant/components/mqtt/lock.py
@@ -84,7 +84,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT lock dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/number.py b/homeassistant/components/mqtt/number.py
index 159f466f7ae..969eb254072 100644
--- a/homeassistant/components/mqtt/number.py
+++ b/homeassistant/components/mqtt/number.py
@@ -67,7 +67,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT number dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, async_add_entities, config_entry=config_entry
     )
@@ -110,7 +109,6 @@ class MqttNumber(MqttEntity, NumberEntity, RestoreEntity):
         @log_messages(self.hass, self.entity_id)
         def message_received(msg):
             """Handle new MQTT messages."""
-
             try:
                 if msg.payload.decode("utf-8").isnumeric():
                     self._current_number = int(msg.payload)
@@ -149,7 +147,6 @@ class MqttNumber(MqttEntity, NumberEntity, RestoreEntity):
 
     async def async_set_value(self, value: float) -> None:
         """Update the current value."""
-
         current_number = value
 
         if value.is_integer():
diff --git a/homeassistant/components/mqtt/scene.py b/homeassistant/components/mqtt/scene.py
index 908f4bafd30..061c7df3fdc 100644
--- a/homeassistant/components/mqtt/scene.py
+++ b/homeassistant/components/mqtt/scene.py
@@ -47,7 +47,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT scene dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/sensor.py b/homeassistant/components/mqtt/sensor.py
index 3f79ab1bafe..78a05179210 100644
--- a/homeassistant/components/mqtt/sensor.py
+++ b/homeassistant/components/mqtt/sensor.py
@@ -72,7 +72,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT sensors dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/switch.py b/homeassistant/components/mqtt/switch.py
index d6d476b680d..73c7d55f6b0 100644
--- a/homeassistant/components/mqtt/switch.py
+++ b/homeassistant/components/mqtt/switch.py
@@ -80,7 +80,6 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT switch dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/tag.py b/homeassistant/components/mqtt/tag.py
index b691c5cf8ce..4960ff50fb5 100644
--- a/homeassistant/components/mqtt/tag.py
+++ b/homeassistant/components/mqtt/tag.py
@@ -45,7 +45,6 @@ PLATFORM_SCHEMA = mqtt.MQTT_BASE_PLATFORM_SCHEMA.extend(
 
 async def async_setup_entry(hass, config_entry):
     """Set up MQTT tag scan dynamically through MQTT discovery."""
-
     setup = functools.partial(async_setup_tag, hass, config_entry=config_entry)
     await async_setup_entry_helper(hass, "tag", setup, PLATFORM_SCHEMA)
 
diff --git a/homeassistant/components/mqtt/vacuum/__init__.py b/homeassistant/components/mqtt/vacuum/__init__.py
index e580e874993..4801c1ea994 100644
--- a/homeassistant/components/mqtt/vacuum/__init__.py
+++ b/homeassistant/components/mqtt/vacuum/__init__.py
@@ -35,7 +35,6 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up MQTT vacuum dynamically through MQTT discovery."""
-
     setup = functools.partial(
         _async_setup_entity, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/vacuum/schema_legacy.py b/homeassistant/components/mqtt/vacuum/schema_legacy.py
index e7be64be6ae..577e6a70ccd 100644
--- a/homeassistant/components/mqtt/vacuum/schema_legacy.py
+++ b/homeassistant/components/mqtt/vacuum/schema_legacy.py
@@ -377,7 +377,6 @@ class MqttVacuum(MqttEntity, VacuumEntity):
 
         No need to check SUPPORT_BATTERY, this won't be called if battery_level is None.
         """
-
         return icon_for_battery_level(
             battery_level=self.battery_level, charging=self._charging
         )