Remove jira_issue_association_on_merge_request feature flag

Changelog: other
EE: true

doc/integration/jira/issues.md

@@ -47,12 +47,9 @@ You can [disable comments](#disable-comments-on-jira-issues) on issues.
 
 ### Require associated Jira issue for merge requests to be merged **(ULTIMATE)**
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/280766) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 13.12 behind a feature flag, disabled by default.
-> - [Deployed behind a feature flag](../../user/feature_flags.md), disabled by default.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/280766) in GitLab 13.12, disabled behind `jira_issue_association_on_merge_request` [feature flag](../../administration/feature_flags.md).
 > - [Enabled by default](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61722) in GitLab 14.1.
-> - Enabled on GitLab.com.
-> - Recommended for production use.
-> - For GitLab self-managed instances, GitLab administrators can opt to [disable it](#enable-or-disable-the-ability-to-require-an-associated-jira-issue-on-merge-requests). **(ULTIMATE SELF)**
+> - [Feature flag removed](https://gitlab.com/gitlab-org/gitlab/-/issues/335280) in GitLab 14.2.
 
 You can prevent merge requests from being merged if they do not refer to a Jira issue.
 To enforce this:
@@ -181,22 +178,3 @@ adding a comment to the Jira issue:
 
 1. Refer to the [Configure GitLab](configure.md) instructions.
 1. Clear the **Enable comments** checkbox.
-
-## Enable or disable the ability to require an associated Jira issue on merge requests
-
-The ability to require an associated Jira issue on merge requests is under development
-but ready for production use. It is deployed behind a feature flag that is
-**enabled by default**.
-[GitLab administrators with access to the GitLab Rails console](../../administration/feature_flags.md) can opt to disable it.
-
-To enable it:
-
-```ruby
-Feature.enable(:jira_issue_association_on_merge_request)
-```
-
-To disable it:
-
-```ruby
-Feature.disable(:jira_issue_association_on_merge_request)
-```

ee/app/models/ee/project.rb

@@ -231,7 +231,6 @@ module EE
         strong_memoize(:jira_issue_association_required_to_merge_enabled) do
           next false unless jira_issues_integration_available?
           next false unless jira_integration&.active?
-          next false unless ::Feature.enabled?(:jira_issue_association_on_merge_request, self, default_enabled: :yaml)
           next false unless feature_available?(:jira_issue_association_enforcement)
 
           true

ee/config/feature_flags/development/jira_issue_association_on_merge_request.yml

----
-name: jira_issue_association_on_merge_request
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/52896
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/300271
-milestone: '13.9'
-type: development
-group: group::compliance
-default_enabled: true

ee/spec/models/project_spec.rb

@@ -138,20 +138,18 @@ RSpec.describe Project do
         )
 
         project.build_jira_integration(active: jira_integration_active)
-        stub_feature_flags(jira_issue_association_on_merge_request: feature_flag)
       end
 
       where(
         jira_integration_licensed: [true, false],
         jira_integration_active: [true, false],
-        jira_enforcement_licensed: [true, false],
-        feature_flag: [true, false]
+        jira_enforcement_licensed: [true, false]
       )
 
       with_them do
         it 'is enabled if all values are true' do
           expect(project.jira_issue_association_required_to_merge_enabled?).to be(
-            jira_integration_licensed && jira_integration_active && jira_enforcement_licensed && feature_flag
+            jira_integration_licensed && jira_integration_active && jira_enforcement_licensed
           )
         end
       end

ee/spec/serializers/ee/merge_request_poll_cached_widget_entity_spec.rb

@@ -29,7 +29,6 @@ RSpec.describe MergeRequestPollCachedWidgetEntity do
 
       before do
         stub_licensed_features(jira_issues_integration: true, jira_issue_association_enforcement: true)
-        stub_feature_flags(jira_issue_association_on_merge_request: true)
       end
 
       it { is_expected.to include(:jira_associations) }
@@ -90,16 +89,11 @@ RSpec.describe MergeRequestPollCachedWidgetEntity do
     context 'when feature is NOT available' do
       using RSpec::Parameterized::TableSyntax
 
-      where(:licensed, :feature_flag) do
-        false | true
-        true  | false
-        false | false
-      end
+      where(licensed: [true, false])
 
       with_them do
         before do
           stub_licensed_features(jira_issue_association_enforcement: licensed)
-          stub_feature_flags(jira_issue_association_on_merge_request: feature_flag)
         end
 
         it { is_expected.not_to include(:jira_associations) }