lib: remove `inherits()` usage

This switches all `util.inherits()` calls to use
`Object.setPrototypeOf()` instead. In fact, `util.inherits()` is
mainly a small wrapper around exactly this function while adding
the `_super` property on the object as well.

Refs: #24395

PR-URL: https://github.com/nodejs/node/pull/24755
Refs: https://github.com/nodejs/node/issues/24395
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/lib/internal/fs/streams.js b/lib/internal/fs/streams.js
index 1eb3439f23..a79dfca9d5 100644
--- a/lib/internal/fs/streams.js
+++ b/lib/internal/fs/streams.js
@@ -17,7 +17,6 @@ const {
 } = require('internal/fs/utils');
 const { Readable, Writable } = require('stream');
 const { toPathIfFileURL } = require('internal/url');
-const util = require('util');
 
 const kMinPoolSpace = 128;
 
@@ -119,7 +118,7 @@ function ReadStream(path, options) {
     }
   });
 }
-util.inherits(ReadStream, Readable);
+Object.setPrototypeOf(ReadStream.prototype, Readable.prototype);
 
 ReadStream.prototype.open = function() {
   fs.open(this.path, this.flags, this.mode, (er, fd) => {
@@ -273,7 +272,7 @@ function WriteStream(path, options) {
   if (typeof this.fd !== 'number')
     this.open();
 }
-util.inherits(WriteStream, Writable);
+Object.setPrototypeOf(WriteStream.prototype, Writable.prototype);
 
 WriteStream.prototype._final = function(callback) {
   if (this.autoClose) {