Use a single repository project and clean up files directly

spec/lib/gitlab/ci/lint_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 RSpec.describe Gitlab::Ci::Lint do
-  let(:project) { create(:project, :repository) }
+  let_it_be(:project) { create(:project, :repository) }
   let_it_be(:user) { create(:user) }
 
   let(:lint) { described_class.new(project: project, current_user: user) }
@@ -89,6 +89,15 @@ RSpec.describe Gitlab::Ci::Lint do
         )
       end
 
+      after do
+        project.repository.delete_file(
+          project.creator,
+          'another-gitlab-ci.yml',
+          message: 'Remove another-gitlab-ci.yml',
+          branch_name: 'master'
+        )
+      end
+
       it 'sets merged_config' do
         root_config = YAML.safe_load(content, [Symbol])
         included_config = YAML.safe_load(included_content, [Symbol])