Remove legacy backup variables

src/freedombone

 # name of a script which keeps running processes going even if they crash
 WATCHDOG_SCRIPT_NAME="keepon"
 
-# the type of backup system used, rsync or obnam
-BACKUP_TYPE='obnam'
-
 # Number of days to keep backups for
 BACKUP_MAX_DAYS=30
 
-# Location of the certificate used to encrypt backups
-BACKUP_CERTIFICATE=/etc/ssl/private/backup.key
-
 # memory limit for php in MB
 MAX_PHP_MEMORY=64
 
       if grep -q "IPFS_PORT" $CONFIGURATION_FILE; then
           IPFS_PORT=$(grep "IPFS_PORT" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi
-      if grep -q "BACKUP_TYPE" $CONFIGURATION_FILE; then
-          BACKUP_TYPE=$(grep "BACKUP_TYPE" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
-      fi
       if grep -q "TRACKER_PORT" $CONFIGURATION_FILE; then
           TRACKER_PORT=$(grep "TRACKER_PORT" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi
       if grep -q "CJDNS_PRIVATE_KEY" $CONFIGURATION_FILE; then
           CJDNS_PRIVATE_KEY=$(grep "CJDNS_PRIVATE_KEY" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi
-      if grep -q "BACKUP_CERTIFICATE" $CONFIGURATION_FILE; then
-          BACKUP_CERTIFICATE=$(grep "BACKUP_CERTIFICATE" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
-      fi
       if grep -q "ROUTER_IP_ADDRESS" $CONFIGURATION_FILE; then
           ROUTER_IP_ADDRESS=$(grep "ROUTER_IP_ADDRESS" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi
   apt-get -y remove --purge apache*
   apt-get -y dist-upgrade
   apt-get -y install ca-certificates emacs24 cpulimit
-  apt-get -y install rsyncrypto cryptsetup libgfshare-bin obnam sshpass
+  apt-get -y install cryptsetup libgfshare-bin obnam sshpass
 
   echo 'initial_setup' >> $COMPLETION_FILE
 }
   if grep -Fxq "configure_backup_key" $COMPLETION_FILE; then
       return
   fi
-  if [[ $BACKUP_TYPE != 'obnam' ]]; then
-      return
-  fi
   apt-get -y install gnupg
 
   BACKUP_KEY_EXISTS=$(gpg_key_exists "root" "$MY_NAME (backup key)")