Remove designs from incidents

app/views/projects/issues/_design_management.html.haml

+- return if @issue.incident?
+
 - requirements_link_url = help_page_path('user/project/issues/design_management', anchor: 'requirements')
 - requirements_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: requirements_link_url }
 - link_end = '</a>'.html_safe

changelogs/unreleased/244947-remove-designs-from-incdients.yml

+---
+title: Remove designs from incidents
+merge_request: 41757
+author:
+type: changed

spec/features/issues/issue_detail_spec.rb

@@ -20,6 +20,19 @@ RSpec.describe 'Issue Detail', :js do
     end
   end
 
+  context 'when user displays the issue as an incident' do
+    let(:issue) { create(:incident, project: project, author: user) }
+
+    before do
+      visit project_issue_path(project, issue)
+      wait_for_requests
+    end
+
+    it 'does not show design management' do
+      expect(page).not_to have_selector('.js-design-management')
+    end
+  end
+
   context 'when issue description has xss snippet' do
     before do
       issue.update!(description: '![xss" onload=alert(1);//](a)')