util: remove redundant declaration

This module is already required in the top scope (Line 3).

PR-URL: #14199
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/util.js

@@ -202,10 +202,8 @@ const kCustomPromisifiedSymbol = Symbol('util.promisify.custom');
 const kCustomPromisifyArgsSymbol = Symbol('customPromisifyArgs');
 
 function promisify(orig) {
-  if (typeof orig !== 'function') {
-    const errors = require('internal/errors');
+  if (typeof orig !== 'function')
     throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'original', 'function');
-  }
 
   if (orig[kCustomPromisifiedSymbol]) {
     const fn = orig[kCustomPromisifiedSymbol];