chore: remove unused code (#21497)

Co-authored-by: 刘江波 <jiangbo721@163.com>

api/models/model.py

                 if "model" in override_model_configs:
                     app_model_config = AppModelConfig()
                     app_model_config = app_model_config.from_model_config_dict(override_model_configs)
-                    assert app_model_config is not None, "app model config not found"
                     model_config = app_model_config.to_dict()
                 else:
                     model_config["configs"] = override_model_configs

api/services/moderation_service.py

-from typing import Optional
-
-from core.moderation.factory import ModerationFactory, ModerationOutputsResult
-from extensions.ext_database import db
-from models.model import App, AppModelConfig
-
-
-class ModerationService:
-    def moderation_for_outputs(self, app_id: str, app_model: App, text: str) -> ModerationOutputsResult:
-        app_model_config: Optional[AppModelConfig] = None
-
-        app_model_config = (
-            db.session.query(AppModelConfig).filter(AppModelConfig.id == app_model.app_model_config_id).first()
-        )
-
-        if not app_model_config:
-            raise ValueError("app model config not found")
-
-        name = app_model_config.sensitive_word_avoidance_dict["type"]
-        config = app_model_config.sensitive_word_avoidance_dict["config"]
-
-        moderation = ModerationFactory(name, app_id, app_model.tenant_id, config)
-        return moderation.moderation_for_outputs(text)