Replace end-to-end test by rspec test

The end-to-end test that deletes a group board is flaky, and so,
this change replaces it by an RSpec test.

app/assets/javascripts/boards/components/boards_selector.vue

@@ -315,8 +315,7 @@ export default {
 
           <gl-dropdown-item
             v-if="showDelete"
-            class="text-danger"
-            data-qa-selector="delete_board_button"
+            class="text-danger js-delete-board"
             @click.prevent="showPage('delete')"
           >
             {{ s__('IssueBoards|Delete board') }}

ee/spec/features/boards/group_boards/board_deletion_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Group Boards', :js do
+  let(:group) { create(:group) }
+  let!(:board_ux) { create(:board, group: group, name: 'UX') }
+  let!(:board_dev) { create(:board, group: group, name: 'Dev') }
+  let(:user) { create(:group_member, user: create(:user), group: group ).user }
+
+  before do
+    stub_licensed_features(multiple_group_issue_boards: true)
+    sign_in(user)
+    visit group_boards_path(group)
+    wait_for_requests
+  end
+
+  it 'deletes a group issue board' do
+    click_boards_dropdown
+
+    wait_for_requests
+
+    find(:css, '.js-delete-board button').click
+    find(:css, '.board-config-modal .js-primary-button').click
+
+    click_boards_dropdown
+
+    page.within('.js-boards-selector') do
+      expect(page).not_to have_content(board_dev.name)
+      expect(page).to have_content(board_ux.name)
+    end
+  end
+
+  def click_boards_dropdown
+    find(:css, '.js-dropdown-toggle').click
+  end
+end

qa/qa/ee/page/component/issue_board/show.rb

@@ -22,7 +22,6 @@ module QA
               element :boards_dropdown
               element :boards_dropdown_content
               element :create_new_board_button
-              element :delete_board_button
             end
 
             view 'app/assets/javascripts/vue_shared/components/deprecated_modal.vue' do
@@ -129,12 +128,6 @@ module QA
               set_name(board_name)
             end
 
-            def delete_current_board
-              click_boards_dropdown_button
-              click_element(:delete_board_button)
-              click_element(:save_changes_button)
-            end
-
             def has_modal_board_name_field?
               has_element?(:board_name_field, wait: 1)
             end

qa/qa/specs/features/ee/browser_ui/2_plan/issue_boards/delete_group_board_spec.rb

-# frozen_string_literal: true
-
-require 'securerandom'
-
-module QA
-  # Failure issue: https://gitlab.com/gitlab-org/gitlab/issues/34936
-  context 'Plan', :quarantine do
-    describe 'Group issue boards' do
-      let(:board_1) { "Board-1-#{SecureRandom.hex(4)}" }
-      let(:board_2) { "Board-2-#{SecureRandom.hex(4)}" }
-
-      let(:group) do
-        QA::Resource::Group.fabricate_via_api!
-      end
-
-      before do
-        Flow::Login.sign_in
-
-        create_group_board(board_1)
-        create_group_board(board_2)
-
-        Page::Main::Menu.perform(&:go_to_groups)
-        Page::Dashboard::Groups.perform do |groups|
-          groups.click_group(group.path)
-        end
-        Page::Group::Menu.perform(&:go_to_issue_boards)
-      end
-
-      it 'deletes a group issue board via the GUI' do
-        EE::Page::Component::IssueBoard::Show.perform do |show|
-          show.delete_current_board
-          show.click_boards_dropdown_button
-
-          expect(show.boards_dropdown_content).not_to have_content(board_1)
-          expect(show.boards_dropdown_content).to have_content(board_2)
-        end
-      end
-
-      def create_group_board(name)
-        QA::EE::Resource::Board::GroupBoard.fabricate_via_api! do |group_board|
-          group_board.group = group
-          group_board.name = name
-        end
-      end
-    end
-  end
-end