Merge branch...

Merge branch '6624-extract-ee-specific-files-lines-for-spec-serializers-issue_serializer_spec-rb' into 'master'

Extract EE specific lines for spec/serializers/issue_serializer_spec.rb

Closes #6624

See merge request gitlab-org/gitlab-ee!10115

spec/serializers/issue_serializer_spec.rb

@@ -9,10 +9,6 @@ describe IssueSerializer do
       .with_indifferent_access
   end
 
-  before do
-    create(:epic_issue, issue: resource)
-  end
-
   context 'non-sidebar issue serialization' do
     let(:serializer) { nil }