Update default.conf

In default.conf removed two comments about
no longer working URLs to hackweek.suse.com
Nowadays it is hackweek.opensuse.org but this
does not contain my old HackWeek projects
so it seems old HackWeek project info is lost.
Those two comments are the only ones in ReaR
about 'hackweek'.

usr/share/rear/conf/default.conf

@@ -421,7 +421,6 @@ FILES_TO_PATCH_PATTERNS="[b]oot/{grub.conf,menu.lst,device.map} [e]tc/grub.* \
 # Relax-and-Recover recovery system update during "rear recover"
 #
 # see https://github.com/rear/rear/issues/841
-# and https://hackweek.suse.com/14/projects/1508
 #
 # The by default empty RECOVERY_UPDATE_URL means this functionality is not used so that
 # "rear recover" runs as usual without updating any files in the ReaR recovery system
@@ -3057,7 +3056,6 @@ RBME_HOSTNAME=$HOSTNAME
 # where one gets the files of an old system back as they had been before.
 # This new kind of "backup" method does not work on files but on RPM packages
 # see https://github.com/rear/rear/issues/1085
-# and https://hackweek.suse.com/15/projects/2242
 # During "rear mkbackup" it will basically only save a list of installed RPM packages
 # into var/lib/rear/backup/ZYPPER/installed_RPM_packages and during "rear recover" it will basically
 # only install those RPM packages as pristine RPM packages from those zypper repositories