cleanup: don't remove old incomplete files twice.

Library/Homebrew/cmd/cleanup.rb

@@ -77,10 +77,6 @@ module Homebrew extend self
           end
         end
       end
-      if pn.basename.to_s.split('.').last == 'incomplete'
-        puts "Removing #{pn}..."
-        rm pn unless ARGV.dry_run?
-      end
     end
   end