Disable lightop for now

Signed-off-by: wenjh <wenjh@sugon.com>

transformer_engine/pytorch/utils.py

@@ -454,6 +454,8 @@ if IS_HIP_EXTENSION:
     
     def use_lightop_w8a8(block_size: List[int]) -> bool:
         """Check whether to use lightop for w8a8"""
+        # Just return False because lightop is not ready now.
+        return False
         if(enable_lightop):
             return get_device_compute_capability() >= (9, 3) and block_size[1] == 128
         else: