[Eagle] Remove the greedy branch and some redundant code (#4363)

Co-authored-by: Sehoon Kim <sehoon@x.ai>

python/sglang/srt/entrypoints/http_server.py

@@ -283,7 +283,7 @@ async def classify_request(obj: EmbeddingReqInput, request: Request):
         return _create_error_response(e)
 
 
-@app.post("/flush_cache")
+@app.api_route("/flush_cache", methods=["GET", "POST"])
 async def flush_cache():
     """Flush the radix cache."""
     _global_state.tokenizer_manager.flush_cache()