Revert 20348 - "Fix LoadFieldByIndex to take mutable heap-numbers into account."

test/mjsunit/regress/regress-load-field-by-index.js

Index: test/mjsunit/regress/regress-load-field-by-index.js
diff --git a/test/mjsunit/regress/regress-load-field-by-index.js b/test/mjsunit/regress/regress-load-field-by-index.js
deleted file mode 100644
index c572c1ee36383835d3e6d068a3c2b4a6fc3e8871..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress/regress-load-field-by-index.js
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2014 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
-
-var o = {a:1.5, b:{}};
-
-function f(o) {
-  var result = [];
-  for (var k in o) {
-    result[result.length] = o[k];
-  }
-  return result;
-}
-
-f(o);
-f(o);
-%OptimizeFunctionOnNextCall(f);
-var array = f(o);
-o.a = 1.7;
-assertEquals(1.5, array[0]);