Is it ok to delete /boot/usr folder?

view story

http://askubuntu.com – Is it OK to delete /boot/usr folder because it contains copies of some folders from the /usr folder and I'm running out of disk space. What folder should be in the /boot folder and how do I know if a folder is not needed through the files and directories tree? I'm on Ubuntu 11.04. Thanks in advance. (HowTos)