After uninstall Parallels 8 "Windows 8 App" remains in Notification Center

I try the uninstall process of Parallels 8 and only one step don't worked:

sh-3.2# rm /System/Library/Extensions/prl*
rm: /System/Library/Extensions/prl*: No such file or directory
sh-3.2#

The Notification center still with "Windows 8 App" option on it.

For me the update is expensive then I will stay in Parallels 7 version.

Thanks

 

I solve this problem deleting a file like said in this conversation.