Enable strict mode testing for sm/Map

test/staging/sm/Map/NaN-as-key.js

@@ -4,8 +4,6 @@
  */
 
 /*---
-flags:
-  - noStrict
 description: |
   All NaNs must be treated as identical keys for Map
 esid: pending

test/staging/sm/Map/constructor-iterator-close.js

@@ -2,8 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-flags:
-  - noStrict
 description: |
   Map/Set/WeakMap/WeakSet constructor should close iterator on error
 esid: pending

test/staging/sm/Map/constructor-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/Map/forEach-selfhosted-behavior.js

@@ -4,8 +4,6 @@
  */
 
 /*---
-flags:
-  - noStrict
 description: |
   Don't use .call(...) in the self-hosted Map.prototype.forEach
 esid: pending

test/staging/sm/Map/getter-name.js

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

test/staging/sm/Map/iterable.js

@@ -4,8 +4,6 @@
  */
 
 /*---
-flags:
-  - noStrict
 description: |
   pending
 esid: pending

test/staging/sm/Map/symbols.js

@@ -5,8 +5,6 @@
 
 /*---
 includes: [deepEqual.js]
-flags:
-  - noStrict
 description: |
   pending
 esid: pending