**READ EDDYQs ANSWER BELOW, I CAN'T DELETE THIS ANSWER (ELSE I WOULD)**

MKLINK cannot be used to delete symbolic links. To remove a symbolic link, simply delete them as if you’re removing a normal file. For example, to delete the foo symbolic link created above, enter the following command:

C:\test>del foo

source: http://www.mydigitallife.info/2007/05/22/create-symbolic-links-hard-links-and-directory-junctions-in-vista-with-mklink/