unlink list
Deletes a list of files.
(Under Unix, it will remove a link to a file, but the file may
still exist if another link references it.)
If list is omitted, it unlinks the file given in $_.
The function returns the number of files successfully deleted.
Note that unlink will not delete directories
unless you are the superuser and the -U flag is
supplied to Perl. Even if these conditions are met, be warned that unlinking a
directory can inflict serious damage on your filesystem. Use rmdir instead.