Merge branch 'zj-remove-repository-languages-feature-gate' into 'master'

Remove feature gates for Repository Languages

Closes #50291

See merge request gitlab-org/gitlab-ce!21186

app/views/projects/show.html.haml

@@ -21,7 +21,6 @@
   %nav.project-stats{ class: [container_class, ("limit-container-width" unless fluid_layout)] }
     = render 'stat_anchor_list', anchors: @project.statistics_anchors(show_auto_devops_callout: show_auto_devops_callout)
     = render 'stat_anchor_list', anchors: @project.statistics_buttons(show_auto_devops_callout: show_auto_devops_callout)
-    - if Feature.enabled?(:repository_languages, @project.namespace.becomes(Namespace))
     = repository_languages_bar(@project.repository_languages)
 
 %div{ class: [container_class, ("limit-container-width" unless fluid_layout)] }

app/workers/detect_repository_languages_worker.rb

@@ -16,8 +16,6 @@ class DetectRepositoryLanguagesWorker
     user = User.find_by(id: user_id)
     return unless project && user
 
-    return if Feature.disabled?(:repository_languages, project.namespace)
-
     try_obtain_lease do
       ::Projects::DetectRepositoryLanguagesService.new(project, user).execute
     end

doc/user/project/repository/index.md

@@ -155,6 +155,16 @@ The repository graph displays visually the Git flow strategy used in that reposi
 
 Find it under your project's **Repository > Graph**.
 
+## Repository Languages
+
+For the default branch of each repository, GitLab will determine what programming languages
+were used and display this on the projects pages.
+
+![Repository Languages bar](img/repository_languages.png)
+
+Not all files are detected, among others; documentation, 
+vendored code, and most markup languages are excluded.
+
 ## Compare
 
 Select branches to compare and view the changes inline:

spec/services/projects/detect_repository_languages_service_spec.rb

@@ -5,10 +5,6 @@ describe Projects::DetectRepositoryLanguagesService, :clean_gitlab_redis_shared_
 
   subject { described_class.new(project, project.owner) }
 
-  before do
-    allow(Feature).to receive(:disabled?).and_return(false)
-  end
-
   describe '#execute' do
     context 'without previous detection' do
       it 'inserts new programming languages in the database' do