Move attribution to standalone attribute [c-d] (#80150)

homeassistant/components/currencylayer/sensor.py

@@ -8,13 +8,7 @@ import requests
 import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
-from homeassistant.const import (
-    ATTR_ATTRIBUTION,
-    CONF_API_KEY,
-    CONF_BASE,
-    CONF_NAME,
-    CONF_QUOTE,
-)
+from homeassistant.const import CONF_API_KEY, CONF_BASE, CONF_NAME, CONF_QUOTE
 from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -23,8 +17,6 @@ from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 _LOGGER = logging.getLogger(__name__)
 _RESOURCE = "http://apilayer.net/api/live"
 
-ATTRIBUTION = "Data provided by currencylayer.com"
-
 DEFAULT_BASE = "USD"
 DEFAULT_NAME = "CurrencyLayer Sensor"
 
@@ -67,6 +59,8 @@ def setup_platform(
 class CurrencylayerSensor(SensorEntity):
     """Implementing the Currencylayer sensor."""
 
+    _attr_attribution = "Data provided by currencylayer.com"
+
     def __init__(self, rest, base, quote):
         """Initialize the sensor."""
         self.rest = rest
@@ -94,11 +88,6 @@ class CurrencylayerSensor(SensorEntity):
         """Return the state of the sensor."""
         return self._state
 
-    @property
-    def extra_state_attributes(self):
-        """Return the state attributes of the sensor."""
-        return {ATTR_ATTRIBUTION: ATTRIBUTION}
-
     def update(self) -> None:
         """Update current date."""
         self.rest.update()