removing type in cask provider

Author: Sean OMeara

providers/cask.rb

@@ -14,7 +14,7 @@ def load_current_resource
   unless @cask.casked
     execute "installing cask #{new_resource.name}" do
       command "/usr/local/bin/brew cask install #{new_resource.name}"
-      not_if "/usr/local/bin/brew brew list | grep #{new_resource.name}"
+      not_if "/usr/local/bin/brew list | grep #{new_resource.name}"
     end
   end
 end