Locally failing test because of git username

- when this test is run locally, the user from the config is not `git`

spec/helpers/projects_helper_spec.rb

@@ -506,7 +506,6 @@ describe ProjectsHelper do
 
     it 'returns the command to push to create project over SSH' do
       allow(Gitlab::CurrentSettings.current_application_settings).to receive(:enabled_git_access_protocol) { 'ssh' }
-      allow(Gitlab.config.gitlab_shell).to receive(:ssh_path_prefix).and_return('git@localhost:')
 
       expect(helper.push_to_create_project_command(user)).to eq("git push --set-upstream #{Gitlab.config.gitlab.user}@localhost:john/$(git rev-parse --show-toplevel | xargs basename).git $(git rev-parse --abbrev-ref HEAD)")
     end