Now I am not sure why would you want to delete XBMC from your Jailbroken AppleTV2, but since alot of you guys requested on creating a page, about it here it is
root@ipaddress:22 Password is alpine
apt-get update
apt-get remove org.xbmc.xbmc-atv2
To Continue Press Y for Yes Press Enter
killall AppleTV
And That is all, it should successfully remove XBMC from Your AppleTV2