[symbolic shapes] remove maybe_guard_rel warning (#166553)

Fixes #ISSUE_NUMBER

Pull Request resolved: https://github.com/pytorch/pytorch/pull/166553
Approved by: https://github.com/laithsakka

torch/fx/experimental/symbolic_shapes.py

@@ -6899,9 +6899,6 @@ class ShapeEnv:
                 self._maybe_guard_rel(arg)
             return
         elif not isinstance(expr, sympy.Rel):
-            log.warning(
-                "_maybe_guard_rel() was called on non-relation expression %s", expr
-            )
             return
 
         # A good example of what goes wrong if you don't do this is