Add return hidden state in the native API (#3897)

Co-authored-by: Beichen-Ma <mabeichen12@gmail.com>
Co-authored-by: Chayenne <zhaochen20@outlook.com>

python/sglang/srt/server_args.py

@@ -162,7 +162,6 @@ class ServerArgs:
     delete_ckpt_after_loading: bool = False
     enable_memory_saver: bool = False
     allow_auto_truncate: bool = False
-    return_hidden_states: bool = False
     enable_custom_logit_processor: bool = False
     tool_call_parser: str = None
     enable_hierarchical_cache: bool = False
@@ -917,11 +916,6 @@ class ServerArgs:
             action="store_true",
             help="Enable users to pass custom logit processors to the server (disabled by default for security)",
         )
-        parser.add_argument(
-            "--return-hidden-states",
-            action="store_true",
-            help="Return hidden states in the response.",
-        )
         parser.add_argument(
             "--tool-call-parser",
             type=str,