Enable strict mode testing for sm/Boolean

test/staging/sm/Boolean/no-boolean-toJSON.js

@@ -2,12 +2,11 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-flags:
-  - noStrict
 description: |
   pending
 esid: pending
 ---*/
+
 /*
  * Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/licenses/publicdomain/
@@ -22,4 +21,3 @@ assert.sameValue(Boolean.prototype.hasOwnProperty('toJSON'), false);
 
 Object.prototype.toJSON = function() { return 2; };
 assert.sameValue(JSON.stringify(new Boolean(true)), "2");
-