Gemfile in uglifier-2.6.0 vs Gemfile in uglifier-2.6.1

@@ -1,15 +1,9 @@
 source "https://rubygems.org"
 
 gemspec
 
-platforms :rbx do
-  gem 'racc'
-  gem 'rubysl', '~> 2.0'
-  gem 'psych'
-end
-
 if RUBY_VERSION >= '1.9'
-  gem 'rubocop', '~> 0.27', :group => [:development]
+  gem 'rubocop', '~> 0.28', :group => [:development]
 else
   gem 'execjs', '~> 2.0.2'
 end