Remove backend usage of jira_issues_list

Remove from views and passing the feature flag to
the frontend.

ee/app/controllers/projects/integrations/jira/issues_controller.rb

@@ -15,10 +15,6 @@ module Projects
         before_action :check_feature_enabled!
         before_action :check_issues_show_enabled!, only: :show
 
-        before_action do
-          push_frontend_feature_flag(:jira_issues_list, project, type: :development)
-        end
-
         rescue_from ::Projects::Integrations::Jira::IssuesFinder::IntegrationError, with: :render_integration_error
         rescue_from ::Projects::Integrations::Jira::IssuesFinder::RequestError, with: :render_request_error
 

ee/app/views/projects/integrations/jira/issues/_nav_btns.html.haml

-.nav-controls.issues-nav-controls
-  = link_to @project.external_issue_tracker.new_issue_url, class: 'btn gl-button gl-align-self-start', target: '_blank', rel: 'noopener noreferrer' do
-    = _('Create new issue in Jira')
-    = sprite_icon('external-link', css_class: 'gl-ml-1')

ee/app/views/projects/integrations/jira/issues/index.html.haml

 - page_title _('Jira Issues')
 - add_page_specific_style 'page_bundles/issues_list'
 
-- if Feature.enabled?(:jira_issues_list, @project, type: :development)
-  #js-jira-issues-list{ data: { issues_fetch_path: project_integrations_jira_issues_path(@project, format: :json),
-    page: params[:page],
-    initial_state: params[:state],
-    initial_sort_by: params[:sort],
-    project_full_path: @project.full_path,
-    issue_create_url: @project.external_issue_tracker.new_issue_url,
-    empty_state_path: image_path('illustrations/issues.svg') } }
-- else
-  .top-area.gl-border-b-0.gl-mt-6
-    = render 'shared/issuable/nav', type: :issues, display_count: false
-    = render 'projects/integrations/jira/issues/nav_btns'
-
-  .js-issuables-list{ data: { endpoint: project_integrations_jira_issues_path(@project, format: :json),
-    'can-bulk-edit': false,
-    'empty-state-meta': { svg_path: image_path('illustrations/issues.svg') },
-    'sort-key': @sort,
-    type: 'jira',
-    'project-path': @project.full_path,
-    'scoped-labels-available': scoped_labels_available?(@project).to_json } }
+#js-jira-issues-list{ data: { issues_fetch_path: project_integrations_jira_issues_path(@project, format: :json),
+  page: params[:page],
+  initial_state: params[:state],
+  initial_sort_by: params[:sort],
+  project_full_path: @project.full_path,
+  issue_create_url: @project.external_issue_tracker.new_issue_url,
+  empty_state_path: image_path('illustrations/issues.svg') } }

ee/spec/features/integrations/jira/jira_issues_list_spec.rb

@@ -9,7 +9,6 @@ RSpec.describe 'Jira issues list' do
 
   before do
     stub_licensed_features(jira_issues_integration: true)
-    stub_feature_flags(jira_issues_list: false)
     project.add_user(user, :developer)
     sign_in(user)
   end