test: remove unused common import in util-inspect-error-cause.js

Removed unnecessary require statement for common module.

Author: Vansh1811

test/fixtures/util/util-inspect-error-cause.js

@@ -1,7 +1,5 @@
 'use strict';
 
-require('../../common');
-
 const { inspect } = require('util');
 
 class FoobarError extends Error {