test: remove outdated V8 flag

The flag is going to be removed upstream in V8 9.0.

Refs: v8/v8@0a480c3

PR-URL: #37151
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Darshan Sen <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>

Author: targos

Diff for: test/node-api/test_buffer/test.js

@@ -1,5 +1,5 @@
 'use strict';
-// Flags: --expose-gc --no-concurrent-array-buffer-freeing --no-concurrent-array-buffer-sweeping
+// Flags: --expose-gc --no-concurrent-array-buffer-sweeping
 
 const common = require('../../common');
 const binding = require(`./build/${common.buildType}/test_buffer`);