tools/catalyst-auto: Remove treeish sed

Removes line which allowed catalyst-auto to convert to snapshot_treeish
on the fly as it's no longer needed.

Signed-off-by: Ian Jordan <immoloism@gmail.com>
Signed-off-by: Matt Turner <mattst88@gentoo.org>

tools/catalyst-auto

@@ -436,10 +436,6 @@ run_catalyst_commands() {
 			done
 		fi
 
-		if [[ -n ${TREEISH} ]]; then
-			sed -i -e "s|snapshot:.*|snapshot_treeish: ${TREEISH}|g" "${i}"
-		fi
-
 		# Expand vars that the spec expects us to.
 		sed -i \
 			-e "s:@TIMESTAMP@:${TIMESTAMP}:g" \