UBUNTU: [Packaging] drop getabis data

BugLink: https://bugs.launchpad.net/bugs/1786013
Signed-off-by: Joseph Salisbury <joseph.salisbury@canonical.com>

debian.realtime/etc/getabis

@@ -1,26 +0,0 @@
-getabis_ppa="${HOME}/.getabis.noble-realtime"
-getabis_source="$(dpkg-parsechangelog -l$DEBIAN/changelog -SSource)"
-
-if ! [ -e "${getabis_ppa}" ] ; then
-	cat <<EOF >&2
-Error: No private PPA URL(s) found, unable to fetch ABI information.
-
-This kernel is built and delivered using private PPA(s). You need to add the
-PPA repo URL(s) (including the username and password) to the file
-${getabis_ppa}.
-
-One URL per line, like:
-
-https://<user>:<pass>@private-ppa.launchpad.net/<ppa-team>/<ppa-name>/ubuntu
-
-EOF
-	exit 1
-fi
-
-readarray -t repo_list < <(sed "s,\s*$,/pool/main/l/${getabis_source}," \
-                               "${getabis_ppa}")
-
-package_prefixes linux-buildinfo
-
-getall amd64 realtime
-getall arm64 realtime