Remove defaulting of translation_key (#251)

`translation_key` no longer defaults to `attribute_name` or `command_name`.

Author: TheJulianJES

zha/application/platforms/__init__.py

@@ -349,10 +349,6 @@ def _init_from_quirks_metadata(self, entity_metadata: EntityMetadata) -> None:
 
         if entity_metadata.translation_key:
             self._attr_translation_key = entity_metadata.translation_key
-        elif has_attribute_name:
-            self._attr_translation_key = entity_metadata.attribute_name
-        elif has_command_name:
-            self._attr_translation_key = entity_metadata.command_name
 
         if has_attribute_name:
             self._unique_id_suffix = entity_metadata.attribute_name