MDEV-32689: Remove Ubuntu Bionic from 10.5

Commit Removed Ubuntu Bionic from
debian/autobake-debs.sh as it's not used
anymore to build official MariaDB images

REMINDER TO MERGER: This commit should not
be merged up to 10.6 or forward

debian/autobake-deb.sh

@@ -76,9 +76,6 @@ case "${LSBNAME}" in
     # need to match here to avoid the default Error however
     ;;
   # UBUNTU
-  bionic)
-    remove_rocksdb_tools
-    ;&
   focal)
     ;&
   impish|jammy|kinetic)