benchmark: simplify URLSearchParams import

PR-URL: https://github.com/nodejs/node/pull/11111
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>

benchmark/url/url-searchparams-iteration.js

@@ -1,7 +1,7 @@
 'use strict';
 const common = require('../common.js');
 const assert = require('assert');
-const URLSearchParams = new (require('url').URL)('a:').searchParams.constructor;
+const { URLSearchParams } = require('url');
 
 const bench = common.createBenchmark(main, {
   method: ['forEach', 'iterator'],

benchmark/url/url-searchparams-parse.js

@@ -1,6 +1,6 @@
 'use strict';
 const common = require('../common.js');
-const URLSearchParams = new (require('url').URL)('a:').searchParams.constructor;
+const { URLSearchParams } = require('url');
 
 const inputs = {
   noencode: 'foo=bar&baz=quux&xyzzy=thud',

benchmark/url/url-searchparams-read.js

@@ -1,6 +1,6 @@
 'use strict';
 const common = require('../common.js');
-const URLSearchParams = new (require('url').URL)('a:').searchParams.constructor;
+const { URLSearchParams } = require('url');
 
 const bench = common.createBenchmark(main, {
   method: ['get', 'getAll', 'has'],

benchmark/url/url-searchparams-stringifier.js

@@ -1,7 +1,7 @@
 'use strict';
 const common = require('../common.js');
 const Buffer = require('buffer').Buffer;
-const URLSearchParams = new (require('url').URL)('a:').searchParams.constructor;
+const { URLSearchParams } = require('url');
 
 const inputs = {
   noencode: 'foo=bar&baz=quux&xyzzy=thud',