[Misc]Further reduce BNB static variable (#10597)

Signed-off-by: Jee Jee Li <pandaleefree@gmail.com>

vllm/model_executor/models/phi3.py

@@ -16,11 +16,5 @@ class Phi3ForCausalLM(LlamaForCausalLM):
     }
 
     # BitandBytes specific attributes
-    default_bitsandbytes_target_modules = [
-        ".gate_up_proj.",
-        ".down_proj.",
-        ".qkv_proj.",
-        ".o_proj.",
-    ]
     # Initialize an empty dict when there is no stacked parameter mapping.
     bitsandbytes_stacked_params_mapping = {}