catalyst-auto: Combine common functions

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

tools/catalyst-auto-sparc64.conf

@@ -10,25 +10,6 @@ KCONFIG_DIR=${REPO_DIR}/releases/weekly/kconfig/sparc
 
 EMAIL_SUBJECT_PREPEND="[sparc-auto]"
 
-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 '~' '-'
-}
-
-# Replace the date/time stamp in the filename to "latest".
-# Forms we handle:
-# stage3-xxx-2018.0.tar.xz
-# stage3-xxx-20180116.tar.xz
-# stage3-xxx-20180116T015819Z.tar.xz
-convert_filename() {
-	sed -E 's:-20[0-9]+(\.[0-9]+|T[0-9]+Z)?:-latest:g'
-}
-
 update_symlinks() {
 	# Symlink the latest stages3 to build from
 	local d f