build: luci.mk: drop support for non-Git SCMs

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

luci.mk

@@ -60,20 +60,10 @@ LUCI_LC_ALIAS.zh_Hant=zh-tw
 PKG_NAME?=$(LUCI_NAME)
 
 PKG_VERSION?=$(if $(DUMP),x,$(strip $(shell \
-	if svn info >/dev/null 2>/dev/null; then \
-		revision="svn-r$$(LC_ALL=C svn info | sed -ne 's/^Revision: //p')"; \
-	elif git log -1 >/dev/null 2>/dev/null; then \
-		revision="svn-r$$(LC_ALL=C git log -1 | sed -ne 's/.*git-svn-id: .*@\([0-9]\+\) .*/\1/p')"; \
-		if [ "$$revision" = "svn-r" ]; then \
-			set -- $$(git log -1 --format="%ct %h" --abbrev=7); \
-			secs="$$(($$1 % 86400))"; \
-			yday="$$(date --utc --date="@$$1" "+%y.%j")"; \
-			revision="$$(printf 'git-%s.%05d-%s' "$$yday" "$$secs" "$$2")"; \
-		fi; \
-	else \
-		revision="unknown"; \
-	fi; \
-	echo "$$revision" \
+	set -- $$(git log -1 --format="%ct %h" --abbrev=7); \
+	secs="$$(($$1 % 86400))"; \
+	yday="$$(date --utc --date="@$$1" "+%y.%j")"; \
+	printf 'git-%s.%05d-%s' "$$yday" "$$secs" "$$2" \
 )))
 
 PKG_GITBRANCH?=$(if $(DUMP),x,$(strip $(shell \