[Misc] Change warn_for_unimplemented_methods to debug (#20455)

Author: mgoin

vllm/utils/__init__.py

@@ -2799,7 +2799,7 @@ def find_unimplemented_methods(self: object):
         if unimplemented_methods:
             method_names = ','.join(unimplemented_methods)
             msg = (f"Methods {method_names} not implemented in {self}")
-            logger.warning(msg)
+            logger.debug(msg)
 
     @wraps(original_init)
     def wrapped_init(self, *args, **kwargs) -> None:
@@ -3005,4 +3005,4 @@ def has_deep_ep() -> bool:
 def has_deep_gemm() -> bool:
     """Whether the optional `deep_gemm` package is available."""
 
-    return _has_module("deep_gemm")
+    return _has_module("deep_gemm")