Revert I+TF for lexical variables

test/mjsunit/regress/regress-v8-5666.js

Index: test/mjsunit/regress/regress-v8-5666.js
diff --git a/test/mjsunit/regress/regress-v8-5666.js b/test/mjsunit/regress/regress-v8-5666.js
deleted file mode 100644
index a023a9ae18365f3ce5c6cbd88eb9dbcc0d9d32f9..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress/regress-v8-5666.js
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2016 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.
-
-// Flags: --allow-natives-syntax
-
-function foo(j) {
-  for (var i = 0; i < j + 1; i++) {
-    if (i === j) %OptimizeOsr();
-  }
-  let k = 1
-}
-
-foo(1000);
-foo(1000);
-%OptimizeFunctionOnNextCall(foo);
-foo(-1);
-assertOptimized(foo);