Merge branch '10685-remove-feature-flag-ce' into 'master'

Remove `approval_rules` feature flag and remove obsolete approvals implementation

See merge request gitlab-org/gitlab-ce!28979

doc/user/project/merge_requests/merge_request_approvals.md

@@ -3,7 +3,7 @@
 > Introduced in [GitLab Enterprise Edition 7.12](https://about.gitlab.com/2015/06/22/gitlab-7-12-released/#merge-request-approvers-ee-only).
 NOTE: **Note:**
-If you are running a self-managed instance, the new interface shown on
+Prior to 12.0, if you are running a self-managed instance, the new interface shown on
 this page will not be available unless the feature flag
 `approval_rules` is enabled, which can be done from the Rails console by
 instance administrators.

spec/features/merge_request/user_creates_merge_request_spec.rb

@@ -8,8 +8,6 @@ describe "User creates a merge request", :js do
   let(:user) { create(:user) }
   before do
-    stub_feature_flags(approval_rules: false)
-
     project.add_maintainer(user)
     sign_in(user)
   end

spec/features/projects/settings/forked_project_settings_spec.rb

@@ -7,7 +7,6 @@ describe 'Projects > Settings > For a forked project', :js do
   let(:forked_project) { fork_project(original_project, user) }
   before do
-    stub_feature_flags(approval_rules: false)
     original_project.add_maintainer(user)
     forked_project.add_maintainer(user)
     sign_in(user)

spec/features/projects_spec.rb

@@ -6,7 +6,6 @@ describe 'Project' do
   before do
     stub_feature_flags(vue_file_list: false)
-    stub_feature_flags(approval_rules: false)
   end
   describe 'creating from template' do

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();
   });