Fix ZHA regressions caused by "Support async validation of device trigger" (#27401)

* Revert "Support async validation of device trigger (#27333)"

This reverts commit fdf4f398a7.

* Revert only ZHA changes

* Fix whitespace

* Restore ZHA changes but add check to make sure ZHA is loaded

* Address review comment

* Remove additional check

homeassistant/components/zha/device_trigger.py

@@ -25,14 +25,14 @@ async def async_validate_trigger_config(hass, config):
     """Validate config."""
     config = TRIGGER_SCHEMA(config)
 
-    trigger = (config[CONF_TYPE], config[CONF_SUBTYPE])
+    if "zha" in hass.config.components:
-    zha_device = await async_get_zha_device(hass, config[CONF_DEVICE_ID])
+        trigger = (config[CONF_TYPE], config[CONF_SUBTYPE])
-
+        zha_device = await async_get_zha_device(hass, config[CONF_DEVICE_ID])
-    if (
+        if (
-        zha_device.device_automation_triggers is None
+            zha_device.device_automation_triggers is None
-        or trigger not in zha_device.device_automation_triggers
+            or trigger not in zha_device.device_automation_triggers
-    ):
+        ):
-        raise InvalidDeviceAutomationConfig
+            raise InvalidDeviceAutomationConfig
 
     return config