test: remove trivial buffer imports

Refs: #13836

PR-URL: #18034
Refs: #13836
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: sreepurnajasti

test/internet/test-dgram-multicast-set-interface-lo.js

@@ -22,7 +22,6 @@ if (common.isSunOS) {
 }
 
 const networkInterfaces = require('os').networkInterfaces();
-const Buffer = require('buffer').Buffer;
 const fork = require('child_process').fork;
 const MULTICASTS = {
   IPv4: ['224.0.0.115', '224.0.0.116', '224.0.0.117'],

test/parallel/test-buffer-from.js

@@ -2,7 +2,6 @@
 
 const common = require('../common');
 const { deepStrictEqual, throws } = require('assert');
-const { Buffer } = require('buffer');
 const { runInNewContext } = require('vm');
 
 const checkString = 'test';

test/parallel/test-buffer-over-max-length.js

@@ -3,7 +3,6 @@ const common = require('../common');
 const assert = require('assert');
 
 const buffer = require('buffer');
-const Buffer = buffer.Buffer;
 const SlowBuffer = buffer.SlowBuffer;
 
 const kMaxLength = buffer.kMaxLength;