Merge branch '334754-fj-remove-feature-flag-wiki-uses-default-branch' into 'master'

Wiki repositories use default branch when creating the repo

See merge request gitlab-org/gitlab!65221

app/models/wiki.rb

@@ -249,8 +249,6 @@ class Wiki
 
   override :default_branch
   def default_branch
-    return 'master' if Feature.disabled?(:wiki_uses_default_branch, user, default_enabled: :yaml)
-
     super || wiki.class.default_ref(container)
   end
 

config/feature_flags/development/wiki_uses_default_branch.yml

----
-name: wiki_uses_default_branch
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/64891
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/334754
-milestone: '14.1'
-type: development
-group: group::editor
-default_enabled: false

spec/support/shared_examples/models/wiki_shared_examples.rb

@@ -545,22 +545,12 @@ RSpec.shared_examples 'wiki model' do
       allow(Gitlab::DefaultBranch).to receive(:value).and_return('main')
     end
 
-    shared_examples 'feature flag wiki_uses_default_branch is disabled' do
-      it 'returns "master"' do
-        stub_feature_flags(wiki_uses_default_branch: false)
-
-        expect(subject).to eq 'master'
-      end
-    end
-
     context 'when repository is not created' do
       let(:wiki_container) { wiki_container_without_repo }
 
       it 'returns the instance default branch' do
         expect(subject).to eq 'main'
       end
-
-      it_behaves_like 'feature flag wiki_uses_default_branch is disabled'
     end
 
     context 'when repository is empty' do
@@ -573,8 +563,6 @@ RSpec.shared_examples 'wiki model' do
       it 'returns the instance default branch' do
         expect(subject).to eq 'main'
       end
-
-      it_behaves_like 'feature flag wiki_uses_default_branch is disabled'
     end
 
     context 'when repository is not empty' do