Fix mojo_js_unittests.

ScopedConstants.TEN_TOO has been removed from mojom.

BUG=None

Review URL: https://codereview.chromium.org/1635783003

Cr-Commit-Position: refs/heads/master@{#371618}

mojo/public/js/struct_unittests.js

@@ -79,7 +79,6 @@ define([
   function testScopedConstants() {
     expect(testStructs.ScopedConstants.TEN).toEqual(10);
     expect(testStructs.ScopedConstants.ALSO_TEN).toEqual(10);
-    expect(testStructs.ScopedConstants.TEN_TOO).toEqual(10);
 
     expect(testStructs.ScopedConstants.EType.E0).toEqual(0);
     expect(testStructs.ScopedConstants.EType.E1).toEqual(1);