xbps-src: remove WIP repo delta support.

- it never worked correctly
- it's WIP and looks like it will be stalled forever
- won't be necessary anymore with xbps-0.42

common/hooks/post-pkg/01-xdelta_repolist.sh

@@ -1,27 +0,0 @@
-# This hook generates vcdiffs for repository data.
-
-hook() {
-	[ -z "$XBPS_REPO_DELTAS" ] && return 0
-	type -P xdelta3 > /dev/null || return 0
-
-	find $XBPS_REPOSITORY -name "${XBPS_TARGET_MACHINE}-repodata.genVcdiff" | xargs -r sha256sum | \
-		while read chk oldfile; do
-			newfile=${oldfile/.genVcdiff/}
-
-			if ! cmp -s "${newfile}" "${oldfile}"; then
-				newdiff="${newfile}.${chk}.vcdiff"
-				xdelta3 -q -f -e -s "${oldfile}" "${newfile}" "${newdiff}"
-				for diff in ${newfile}.*.vcdiff; do
-					[ "${diff}" = "${newdiff}" ] && continue;
-					cp -- "${diff}" "${diff}.tmp"
-					xdelta3 -q -f merge -m "${diff}.tmp" "${newdiff}" "${diff}"
-					rm -- "${diff}.tmp"
-				done
-			fi
-
-			# generate an empty diff to the new file
-			newchk=`sha256sum ${newfile} | awk '{ print $1 }'`
-			xdelta3 -q -f -e -s "${newfile}" "${newfile}" "${newfile}.${newchk}.vcdiff"
-			rm -- "${oldfile}"
-		done
-}

common/hooks/pre-pkg/01-xdelta_repolist.sh

@@ -1,12 +0,0 @@
-# this hook marks files which are about to change for generating vcdiffs
-
-hook() {
-	[ -z "$XBPS_REPO_DELTAS" ] && return 0
-	type -P xdelta3 > /dev/null || return 0
-
-	# create links to preserve old versions of repodata
-	find $XBPS_REPOSITORY -name "${XBPS_TARGET_MACHINE}-repodata" | while read; do
-		( rm "${REPLY}.genVcdiff" 2>/dev/null ) || true
-		cp "${REPLY}" "${REPLY}.genVcdiff"
-	done
-}