FE: Remove legacy approval feature in MR files

spec/javascripts/vue_mr_widget/mr_widget_options_spec.js

@@ -21,7 +21,6 @@ describe('mrWidgetOptions', () => {
   const COLLABORATION_MESSAGE = 'Allows commits from members who can merge to the target branch';
 
   beforeEach(() => {
-    gon.features = { approvalRules: false };
     // Prevent component mounting
     delete mrWidgetOptions.el;
 
@@ -32,7 +31,6 @@ describe('mrWidgetOptions', () => {
   });
 
   afterEach(() => {
-    gon.features = null;
     vm.$destroy();
   });