catalyst-auto: Combine common functions

Signed-off-by: Matt Turner <mattst88@gentoo.org>

tools/catalyst-auto-amd64.conf

@@ -41,16 +41,6 @@ KCONFIG_DIR=${REPO_DIR}/releases/weekly/kconfig/${ARCH}
 
 EXTENSIONS="[.tar.xz,.tar.bz2,.tar.gz,.tar,.sfs]"
 
-give_latest_from_dates() {
-	sed 's,-20,~20,g' | \
-	sort -k +1 -n -t '~' | \
-	awk -F\~ \
-	'BEGIN{i=$1; o=$0};
-	{ if($1 != i && i != "") { print o; }; i=$1; o=$0;  }
-	END { print o; };' | \
-	tr '~' '-'
-}
-
 update_symlinks() {
 	# Symlink the latest stages3 to build from
 	for d in ${BUILD_SRCDIR_BASE}/{default,hardened} ; do