Fix implicit-return in python_script (#123004)

homeassistant/components/python_script/__init__.py

@@ -108,13 +108,13 @@ def setup(hass: HomeAssistant, config: ConfigType) -> bool:
     return True
 
 
-def discover_scripts(hass):
+def discover_scripts(hass: HomeAssistant) -> None:
     """Discover python scripts in folder."""
     path = hass.config.path(FOLDER)
 
     if not os.path.isdir(path):
         _LOGGER.warning("Folder %s not found in configuration folder", FOLDER)
-        return False
+        return
 
     def python_script_service_handler(call: ServiceCall) -> ServiceResponse:
         """Handle python script service calls."""