drop _tied_weights_keys

Signed-off-by: Mayank Mishra <mayank31398@gmail.com>

Author: mayank31398

lm_engine/hf_models/config/__init__.py

@@ -50,8 +50,6 @@ def _run(self, *args, **kwargs):
 
 
 class CommonConfig(PretrainedConfig):
-    keys_to_ignore_at_inference = ["past_key_values"]
-
     def __init__(
         self,
         vocab_size: int = 50304,