Remove unused imports in fritz, nest, and somfy to fix CI (#49940)

homeassistant/components/fritz/config_flow.py

@@ -5,7 +5,6 @@ from urllib.parse import urlparse
 from fritzconnection.core.exceptions import FritzConnectionException, FritzSecurityError
 import voluptuous as vol
 
-from homeassistant import config_entries
 from homeassistant.components.ssdp import (
     ATTR_SSDP_LOCATION,
     ATTR_UPNP_FRIENDLY_NAME,

homeassistant/components/nest/config_flow.py

@@ -21,7 +21,6 @@ import os
 import async_timeout
 import voluptuous as vol
 
-from homeassistant import config_entries
 from homeassistant.core import callback
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import config_entry_oauth2_flow

homeassistant/components/somfy/config_flow.py

@@ -1,7 +1,6 @@
 """Config flow for Somfy."""
 import logging
 
-from homeassistant import config_entries
 from homeassistant.helpers import config_entry_oauth2_flow
 
 from .const import DOMAIN