Remove FLAG_min_preparse_length.

test/message/for-loop-invalid-lhs.js

Index: test/message/for-loop-invalid-lhs.js
diff --git a/test/message/for-loop-invalid-lhs.js b/test/message/for-loop-invalid-lhs.js
index c545230348a8a73f60430673557d7c5ac1c467e9..81a9512a6c3b2a6034cc395caaff6b056c484aaf 100644
--- a/test/message/for-loop-invalid-lhs.js
+++ b/test/message/for-loop-invalid-lhs.js
@@ -1,9 +1,5 @@
 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// TODO(adamk): Remove flag after the test runner tests all message tests with
-// the preparser: https://code.google.com/p/v8/issues/detail?id=4372
-// Flags: --min-preparse-length=0
 
 function f() { for ("unassignable" in {}); }