unlink LIST
    unlink  Deletes a list of files. On success, it returns the number of
            files it successfully deleted. On failure, it returns false and
            sets $! (errno):

                my $unlinked = unlink 'a', 'b', 'c';
                unlink @goners;
                unlink glob "*.bak";

            On error, "unlink" will not tell you which files it could not
            remove. If you want to know which files you could not remove,
            try them one at a time:

                 foreach my $file ( @goners ) {
                     unlink $file or warn "Could not unlink $file: $!";
                 }

            Note: "unlink" will not attempt to delete directories unless you
            are superuser and the -U flag is supplied to Perl. Even if these
            conditions are met, be warned that unlinking a directory can
            inflict damage on your filesystem. Finally, using "unlink" on
            directories is not supported on many operating systems. Use
            "rmdir" instead.

            If LIST is omitted, "unlink" uses $_.