Cleanup rainbird controller setup as feedback from previous PR (#84504)

Additional rainbird cleanup from last PR

homeassistant/components/rainbird/__init__.py

@@ -36,7 +36,6 @@ PLATFORMS = [Platform.SWITCH, Platform.SENSOR, Platform.BINARY_SENSOR]
 
 _LOGGER = logging.getLogger(__name__)
 
-DATA_RAINBIRD = "rainbird"
 DOMAIN = "rainbird"
 
 TRIGGER_TIME_SCHEMA = vol.All(
@@ -65,13 +64,14 @@ CONFIG_SCHEMA = vol.Schema(
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up the Rain Bird component."""
-
-    hass.data[DATA_RAINBIRD] = []
-
-    tasks = []
-    for controller_config in config[DOMAIN]:
-        tasks.append(_setup_controller(hass, controller_config, config))
-    return all(await asyncio.gather(*tasks))
+    return all(
+        await asyncio.gather(
+            *[
+                _setup_controller(hass, controller_config, config)
+                for controller_config in config[DOMAIN]
+            ]
+        )
+    )
 
 
 async def _setup_controller(hass, controller_config, config):
@@ -80,20 +80,18 @@ async def _setup_controller(hass, controller_config, config):
     password = controller_config[CONF_PASSWORD]
     client = AsyncRainbirdClient(async_get_clientsession(hass), server, password)
     controller = AsyncRainbirdController(client)
-    position = len(hass.data[DATA_RAINBIRD])
     try:
         await controller.get_serial_number()
     except RainbirdApiException as exc:
         _LOGGER.error("Unable to setup controller: %s", exc)
         return False
-    hass.data[DATA_RAINBIRD].append(controller)
 
     rain_coordinator = RainbirdUpdateCoordinator(hass, controller.get_rain_sensor_state)
     delay_coordinator = RainbirdUpdateCoordinator(hass, controller.get_rain_delay)
 
-    _LOGGER.debug("Rain Bird Controller %d set to: %s", position, server)
     for platform in PLATFORMS:
-        discovery.load_platform(
+        hass.async_create_task(
+            discovery.async_load_platform(
                 hass,
                 platform,
                 DOMAIN,
@@ -105,4 +103,5 @@ async def _setup_controller(hass, controller_config, config):
                 },
                 config,
             )
+        )
     return True