Appraisals in trix-rails-2.1.0 vs Appraisals in trix-rails-2.2.0

@@ -1,8 +1,4 @@
-appraise 'rails-4.2' do
-  gem 'rails', '~> 4.2.0'
-end
-
 appraise 'rails-5.0' do
   gem 'rails', '~> 5.0.0'
 end
 
 appraise 'rails-5.1' do