Remove assert.js includes.

...ments-object/mapped/mapped-arguments-nonconfigurable-1.js

...ments-object/mapped/mapped-arguments-nonconfigurable-2.js

...ments-object/mapped/mapped-arguments-nonconfigurable-3.js

...ments-object/mapped/mapped-arguments-nonconfigurable-4.js

...bject/mapped/mapped-arguments-nonconfigurable-delete-1.js

...bject/mapped/mapped-arguments-nonconfigurable-delete-2.js

...bject/mapped/mapped-arguments-nonconfigurable-delete-3.js

...bject/mapped/mapped-arguments-nonconfigurable-delete-4.js

.../mapped/mapped-arguments-nonconfigurable-nonwritable-1.js

.../mapped/mapped-arguments-nonconfigurable-nonwritable-2.js

.../mapped/mapped-arguments-nonconfigurable-nonwritable-3.js

.../mapped/mapped-arguments-nonconfigurable-nonwritable-4.js

.../mapped/mapped-arguments-nonconfigurable-nonwritable-5.js

...apped/mapped-arguments-nonconfigurable-strict-delete-1.js

...apped/mapped-arguments-nonconfigurable-strict-delete-2.js

...apped/mapped-arguments-nonconfigurable-strict-delete-3.js

...apped/mapped-arguments-nonconfigurable-strict-delete-4.js

.../mapped/mapped-arguments-nonwritable-nonconfigurable-1.js

.../mapped/mapped-arguments-nonwritable-nonconfigurable-2.js

.../mapped/mapped-arguments-nonwritable-nonconfigurable-3.js