Remove factories from MigrateUserProjectView spec

spec/migrations/migrate_user_project_view_spec.rb

@@ -3,15 +3,15 @@
 require 'spec_helper'
 require Rails.root.join('db', 'post_migrate', '20170406142253_migrate_user_project_view.rb')
-describe MigrateUserProjectView, :delete do
+describe MigrateUserProjectView, :migration do
   let(:migration) { described_class.new }
-  let!(:user) { create(:user, project_view: 'readme') } # rubocop:disable RSpec/FactoriesInMigrationSpecs
+  let!(:user) { table(:users).create!(project_view: User.project_views['readme']) }
   describe '#up' do
     it 'updates project view setting with new value' do
       migration.up
-      expect(user.reload.project_view).to eq('files')
+      expect(user.reload.project_view).to eq(User.project_views['files'])
     end
   end
 end