[Chore] Remove ipex_ops warning (#24835)

Signed-off-by: Robert Shaw <114415538+robertgshaw2-redhat@users.noreply.github.com>

vllm/_ipex_ops.py

@@ -13,7 +13,7 @@ logger = init_logger(__name__)
 try:
     import intel_extension_for_pytorch as ipex
 except ImportError as e:
-    logger.warning("Import error msg: %s", e.msg)
+    logger.debug("Import error msg: %s", e.msg)
 
 
 class ipex_ops: