refactor: remove metadata provider

deadlock-plugins/deadlock-extension/src/extension.ts

 import * as vscode from 'vscode';
-import { SERVICES_PATHS_PATH } from './core/config';
 import Controller from './core/controller';
-import MetadataProvider from './core/metadataProvider';
 import { error } from './recorder/utils';
 import { DepNodeProvider } from './theia/deadlockPanel';
 import UserConfigTheia from './theia/userConfigTheia';
@@ -23,7 +21,4 @@ export async function activate(context: vscode.ExtensionContext) {
   } catch (e) {
     error('Cannot init userConfig');
   }
-
-  MetadataProvider.loadPathsToEnvVariables();
-  MetadataProvider.loadPathsToJson(`${SERVICES_PATHS_PATH}`);
 }