Remove invalid return values in setup methods [a-h] (#63362)

Co-authored-by: epenet <epenet@users.noreply.github.com>

homeassistant/components/digital_ocean/switch.py

@@ -1,11 +1,16 @@
 """Support for interacting with Digital Ocean droplets."""
+from __future__ import annotations
+
 import logging
 
 import voluptuous as vol
 
 from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchEntity
 from homeassistant.const import ATTR_ATTRIBUTION
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import (
     ATTR_CREATED_AT,
@@ -31,10 +36,15 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+def setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Digital Ocean droplet switch."""
     if not (digital := hass.data.get(DATA_DIGITAL_OCEAN)):
-        return False
+        return
 
     droplets = config[CONF_DROPLETS]
 
@@ -42,7 +52,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
     for droplet in droplets:
         if (droplet_id := digital.get_droplet_id(droplet)) is None:
             _LOGGER.error("Droplet %s is not available", droplet)
-            return False
+            return
         dev.append(DigitalOceanSwitch(digital, droplet_id))
 
     add_entities(dev, True)