chore: remove unused schema definitions from embedding model endpoints

--bug=1064123 --user=刘瑞斌 【接口文档】文档中获取知识库向量模型的接口应该废弃了，建议更新 https://www.tapd.cn/62980211/s/1807620

Author: liuruibin

apps/knowledge/views/knowledge.py

@@ -361,15 +361,6 @@ def get(self, request: Request, workspace_id: str):
     class EmbeddingModel(APIView):
         authentication_classes = [TokenAuth]
 
-        @extend_schema(
-            methods=['GET'],
-            summary=_('Get embedding model for knowledge base'),
-            description=_('Get embedding model for knowledge base'),
-            operation_id=_('Get embedding model for knowledge base'),  # type: ignore
-            parameters=GetModelAPI.get_parameters(),
-            responses=GetModelAPI.get_response(),
-            tags=[_('Knowledge Base')]  # type: ignore
-        )
         @has_permissions(
             PermissionConstants.KNOWLEDGE_EDIT.get_workspace_permission(),
             RoleConstants.WORKSPACE_MANAGE.get_workspace_role(), RoleConstants.USER.get_workspace_role()