diff --git a/python/sglang/srt/openai_api/adapter.py b/python/sglang/srt/openai_api/adapter.py
index cbbc741d6..5056ba22e 100644
--- a/python/sglang/srt/openai_api/adapter.py
+++ b/python/sglang/srt/openai_api/adapter.py
@@ -696,14 +696,6 @@ def v1_generate_response(request, ret, tokenizer_manager, to_file=False):
 
 async def v1_completions(tokenizer_manager, raw_request: Request):
     request_json = await raw_request.json()
-    if "extra_body" in request_json:
-        extra = request_json["extra_body"]
-        if "ebnf" in extra:
-            request_json["ebnf"] = extra["ebnf"]
-        if "regex" in extra:
-            request_json["regex"] = extra["regex"]
-        # remove extra_body to avoid pydantic conflict
-        del request_json["extra_body"]
     all_requests = [CompletionRequest(**request_json)]
     adapted_request, request = v1_generate_request(all_requests)
 
@@ -1176,15 +1168,6 @@ def v1_chat_generate_response(request, ret, to_file=False, cache_report=False):
 
 async def v1_chat_completions(tokenizer_manager, raw_request: Request):
     request_json = await raw_request.json()
-    if "extra_body" in request_json:
-        extra = request_json["extra_body"]
-        # For example, if 'ebnf' is given:
-        if "ebnf" in extra:
-            request_json["ebnf"] = extra["ebnf"]
-        if "regex" in extra:
-            request_json["regex"] = extra["regex"]
-        # remove extra_body to avoid pydantic conflict
-        del request_json["extra_body"]
     all_requests = [ChatCompletionRequest(**request_json)]
     adapted_request, request = v1_chat_generate_request(all_requests, tokenizer_manager)