[configs/releng] Remove local copy of resolv.conf

Nobody touches this file now (previously was mkarchroot)
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

configs/releng/root-image/etc/resolv.conf

-#
-# /etc/resolv.conf
-#
-
-#search <yourdomain.tld>
-#nameserver <ip>
-
-# End of file