👋 Remove backend parameter from GuidedDecodingParams (#4123)

Author: qgallouedec

trl/scripts/vllm_serve.py

@@ -557,7 +557,7 @@ async def generate(request: GenerateRequest):
 
         # Guided decoding, if enabled
         if request.guided_decoding_regex is not None:
-            guided_decoding = GuidedDecodingParams(backend="outlines", regex=request.guided_decoding_regex)
+            guided_decoding = GuidedDecodingParams(regex=request.guided_decoding_regex)
         else:
             guided_decoding = None