Don't warn on lack of type annotations on op handler

Author: dandavison

temporalio/nexus/_util.py

@@ -78,19 +78,10 @@ def _get_start_method_input_and_output_type_annotations(
     try:
         type_annotations = typing.get_type_hints(start)
     except TypeError:
-        warnings.warn(
-            f"Expected decorated start method {start} to have type annotations"
-        )
         return None, None
     output_type = type_annotations.pop("return", None)
 
     if len(type_annotations) != 2:
-        suffix = f": {type_annotations}" if type_annotations else ""
-        warnings.warn(
-            f"Expected decorated start method {start} to have exactly 2 "
-            f"type-annotated parameters (ctx and input), but it has {len(type_annotations)}"
-            f"{suffix}."
-        )
         input_type = None
     else:
         ctx_type, input_type = type_annotations.values()