Gemfile in wisper-1.6.0 vs Gemfile in wisper-1.6.1

@@ -1,10 +1,8 @@
 source 'https://rubygems.org'
 
 gemspec
 
-gem 'rubysl', '~> 2.0', :platforms => :rbx
-
 gem 'rake',  '~> 10.3.0'
 gem 'rspec', '~> 3.0.0'
 gem 'coveralls', require: false
 
 group :extras do