Enable strict mode testing for sm/destructuring

test/staging/sm/destructuring/array-default-class.js

@@ -2,8 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-flags:
-  - noStrict
 description: |
   Function in computed property in class expression in array destructuring default
 esid: pending

test/staging/sm/destructuring/array-iterator-close.js

@@ -3,8 +3,6 @@
 
 /*---
 includes: [sm/assertThrowsValue.js]
-flags:
-  - noStrict
 description: |
   Tests that IteratorClose is called in array destructuring patterns.
 esid: pending

test/staging/sm/destructuring/bug1396261.js

@@ -2,8 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-flags:
-  - noStrict
 description: |
   pending
 esid: pending

test/staging/sm/destructuring/constant-folding.js

@@ -2,8 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-flags:
-  - noStrict
 description: |
   pending
 esid: pending

test/staging/sm/destructuring/iterator-primitive.js

@@ -2,8 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-flags:
-  - noStrict
 description: |
   Returning non-object from @@iterator should throw
 esid: pending

test/staging/sm/destructuring/order-super.js

@@ -2,8 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-flags:
-  - noStrict
 description: |
   Destructuring should evaluate lhs reference before rhs in super property
 esid: pending