load cleanups (#23112)

* load cleanups

* Remove unused methods

* Allow importing requirements at the top of a file

* Fix test

* Lint

* Install reqs ASAP when loading platforms

homeassistant/components/hue/bridge.py

@@ -1,6 +1,7 @@
 """Code to handle a Hue bridge."""
 import asyncio
 
+import aiohue
 import async_timeout
 import voluptuous as vol
 
@@ -133,8 +134,6 @@ class HueBridge:
 
 async def get_bridge(hass, host, username=None):
     """Create a bridge object and verify authentication."""
-    import aiohue
-
     bridge = aiohue.Bridge(
         host, username=username,
         websession=aiohttp_client.async_get_clientsession(hass)

homeassistant/components/hue/config_flow.py

@@ -3,6 +3,7 @@ import asyncio
 import json
 import os
 
+from aiohue.discovery import discover_nupnp
 import async_timeout
 import voluptuous as vol
 
@@ -57,8 +58,6 @@ class HueFlowHandler(config_entries.ConfigFlow):
 
     async def async_step_init(self, user_input=None):
         """Handle a flow start."""
-        from aiohue.discovery import discover_nupnp
-
         if user_input is not None:
             self.host = user_input['host']
             return await self.async_step_link()

homeassistant/components/hue/light.py

@@ -5,6 +5,7 @@ import logging
 from time import monotonic
 import random
 
+import aiohue
 import async_timeout
 
 from homeassistant.components import hue
@@ -152,8 +153,6 @@ async def async_update_items(hass, bridge, async_add_entities,
                              request_bridge_update, is_group, current,
                              progress_waiting):
     """Update either groups or lights from the bridge."""
-    import aiohue
-
     if is_group:
         api_type = 'group'
         api = bridge.api.groups