Remove unused code

AttachmentAdapter now handles this for us.

lib/paperclip/attachment.rb

@@ -426,10 +426,6 @@ module Paperclip
 
     # called by storage after the writes are flushed and before @queued_for_writes is cleared
     def after_flush_writes
-      @queued_for_write.each do |style, file|
-        # file.close unless file.closed?
-        # file.unlink if file.respond_to?(:unlink) && file.path.present? && File.exist?(file.path)
-      end
     end
 
     def cleanup_filename(filename)