Remove removed flags from tests

BUG=None
LOG=Y
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/454003002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23203 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/es6/unscopables.js

@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-unscopables
-// Flags: --harmony-collections
-
 var global = this;
 var globalProto = Object.getPrototypeOf(global);
 

test/mjsunit/harmony/proxies-with-unscopables.js

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-unscopables
 // Flags: --harmony-proxies