Gemspec already restricts capistrano version 3+

lib/capistrano/sneakers.rb

-require 'capistrano/sneakers/version'
-
-cap_version = Gem::Specification.find_by_name('capistrano').version
-if cap_version >= Gem::Version.new('3.0.0')
-  #
-  # Load Tasks from sneakers "cap" file
-  #
-  load File.expand_path('../tasks/sneakers.rake', __FILE__)
-else
-  raise Gem::LoadError, "Capistrano-Sneakers requires capistrano version 3.0.0 or greater, version detected: #{cap_version}"
-end
+load File.expand_path('../tasks/sneakers.rake', __FILE__)