Merge branch 'simplify-test-to-avoid-flakiness' into 'master'

Simplify test to avoid flakiness

Closes #37369

See merge request gitlab-org/gitlab!20931

qa/qa/specs/features/ee/browser_ui/2_plan/related_issues/related_issues_spec.rb

@@ -37,14 +37,12 @@ module QA
           show.relate_issue(issue_2)
 
           show.wait(reload: false, max: max_wait, interval: wait_interval) do
-            expect(show).to have_content("marked this issue as related to ##{issue_2.iid}")
             expect(show.related_issuable_item).to have_content(issue_2.title)
           end
 
           show.click_remove_related_issue_button
 
           show.wait(reload: false, max: max_wait, interval: wait_interval) do
-            expect(show).to have_content("removed the relation with ##{issue_2.iid}")
             expect(show).not_to have_content(issue_2.title)
           end
         end