Remove unsupported parameters

Author: AdrienVannson

src/betterproto2_compiler/templates/service_stub_sync.py.j2

@@ -23,11 +23,6 @@
             {# Client streaming: need a request iterator instead #}
             , messages: "Iterable[{{ method.py_input_message_type }}]"
         {%- endif -%}
-            ,
-            *
-            , timeout: "float | None" = None
-            , deadline: "Deadline | None" = None
-            , metadata: "MetadataLike | None" = None
             ) -> "{% if method.server_streaming %}Iterator[{{ method.py_output_message_type }}]{% else %}{{ method.py_output_message_type }}{% endif %}":
 {% endblock %}