Gemfile in adyen-2.3.0 vs Gemfile in adyen-2.4.0

@@ -4,10 +4,9 @@
 ruby RUBY_VERSION
 
 gem 'pry'
 
 platform :rbx do
-  gem 'rubysl'
   gem 'racc'
 end
 
 platform :jruby do
   gem 'jruby-openssl'