rubocop.gemspec in rubocop-0.13.0 vs rubocop.gemspec in rubocop-0.13.1

@@ -26,10 +26,9 @@
   s.rubygems_version = '1.8.23'
   s.summary = 'Automatic Ruby code style checking tool.'
 
   s.add_runtime_dependency('rainbow', '>= 1.1.4')
   s.add_runtime_dependency('parser', '~> 2.0.0.pre6')
-  s.add_runtime_dependency('backports', '~> 3.3.3')
   s.add_runtime_dependency('powerpack', '~> 0.0.6')
   s.add_development_dependency('rake', '~> 10.1')
   s.add_development_dependency('rspec', '~> 2.14')
   s.add_development_dependency('yard', '~> 0.8')
   s.add_development_dependency('bundler', '~> 1.3')