fix: bug for schedular config

Author: CaralHsi

src/memos/api/config.py

@@ -251,7 +251,6 @@ def get_scheduler_config() -> dict[str, Any]:
             "backend": "general_scheduler",
             "config": {
                 "top_k": int(os.getenv("MOS_SCHEDULER_TOP_K", "10")),
-                "top_n": int(os.getenv("MOS_SCHEDULER_TOP_N", "5")),
                 "act_mem_update_interval": int(
                     os.getenv("MOS_SCHEDULER_ACT_MEM_UPDATE_INTERVAL", "300")
                 ),