Fix conflicts in sidebar/_group

app/views/layouts/nav/sidebar/_group.html.haml

 - issues = IssuesFinder.new(current_user, group_id: @group.id, state: 'opened').execute
 - merge_requests = MergeRequestsFinder.new(current_user, group_id: @group.id, state: 'opened', non_archived: true).execute
 
-<<<<<<< HEAD
 - issues_sub_menu_items = ['groups#issues', 'labels#index', 'milestones#index']
 - if @group.feature_available?(:group_issue_boards)
   - issues_sub_menu_items.push('boards#index', 'boards#show')
 
-=======
->>>>>>> upstream/master
 .nav-sidebar{ class: ("sidebar-collapsed-desktop" if collapsed_sidebar?) }
   .nav-sidebar-inner-scroll
     .context-header