Revert "Update utils.js (brianc#2981)"

This reverts commit 522e2dc.

Author: charmander

packages/pg/lib/crypto/utils.js

@@ -1,5 +1,5 @@
 'use strict'
-const { TextEncoder, TextDecoder } = require('util');
+
 const useLegacyCrypto = parseInt(process.versions && process.versions.node && process.versions.node.split('.')[0]) < 15
 if (useLegacyCrypto) {
   // We are on an old version of Node.js that requires legacy crypto utilities.