Update test-webidl.js

Author: anonrig

test/wpt/test-webidl.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const common = require('../common');
+require('../common');
 const { WPTRunner } = require('../common/wpt');
 
 const runner = new WPTRunner('webidl');