Remove duplicate method
master
was failing on a duplicate method definition: https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/146849291
Offenses:
qa/qa/git/repository.rb:99:7: W: Lint/DuplicateMethods: Method QA::Git::Repository#merge is defined at both qa/qa/git/repository.rb:95 and qa/qa/git/repository.rb:99.
def merge(branch)
^^^
10485 files inspected, 1 offense detected