Remove obsolete args docs.

src/service.py

@@ -204,9 +204,6 @@ class ApiService():
     def set_clock_info(self, data, plain_json):
         """
         Sets the clock info for the given source (engine1, engine2, other).
-
-        Args:
-            source_number (Integer): Number of the engine
         """
         if data.engine_source <= 0:
             return