Fix Style/MixinUsage offenses

.rubocop_todo.yml

@@ -551,15 +551,6 @@ Style/Lambda:
 Style/MissingRespondToMissing:
   Enabled: false
 
-# Offense count: 5
-Style/MixinUsage:
-  Exclude:
-    - 'spec/factories/ci/builds.rb'
-    - 'spec/factories/ci/job_artifacts.rb'
-    - 'spec/factories/lfs_objects.rb'
-    - 'spec/factories/notes.rb'
-    - 'spec/lib/gitlab/import_export/version_checker_spec.rb'
-
 # Offense count: 35
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, MinBodyLength.

spec/lib/gitlab/import_export/version_checker_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-include ImportExport::CommonUtil
 
 RSpec.describe Gitlab::ImportExport::VersionChecker do
+  include ImportExport::CommonUtil
+
   let!(:shared) { Gitlab::ImportExport::Shared.new(nil) }
 
   describe 'bundle a project Git repo' do