Fix Rubocop offense in merge request specs

spec/requests/api/merge_requests_spec.rb

@@ -465,7 +465,6 @@ describe API::API, api: true  do
       expect(response).to have_http_status(200)
     end
 
-
     it "enables merge when pipeline succeeds if the pipeline is active" do
       allow_any_instance_of(MergeRequest).to receive(:head_pipeline).and_return(pipeline)
       allow(pipeline).to receive(:active?).and_return(true)