Remove duplicated test files and adjust rubocop offenses

spec/ee/spec/features/boards/scoped_issue_board_spec.rb

@@ -185,7 +185,6 @@ describe 'Scoped issue boards', :js do
 
           expect(page).to have_css('.js-visual-token')
           expect(find('.tokens-container')).to have_content(milestone.title)
-
           expect(page).to have_selector('.card', count: 1)
         end
 
@@ -343,15 +342,6 @@ describe 'Scoped issue boards', :js do
       end
     end
 
-    context 'add issue' do
-      it 'adds assignee' do
-        visit boards_path(filtered_board)
-
-
-
-      end
-    end
-
     context 'remove issue' do
       let!(:issue) { create(:labeled_issue, project: project, labels: [project_label], milestone: milestone, assignees: [user]) }
       let!(:list) { create(:list, board: board, label: project_label, position: 0) }