Gemfile in runcible-1.4.0 vs Gemfile in runcible-1.5.0

@@ -10,9 +10,5 @@
   gem 'minitest', '~> 4.7'
   gem 'parseconfig'
   gem 'mocha', "~> 0.14.0"
   gem 'rubocop', "0.24.1"
 end
-
-group :debug do
-  gem 'debugger' if RUBY_VERSION == "1.9.3"
-end