remove --apply-vbmeta from vbmeta_vendor

Removing this flag as --apply-vbmeta should only be used for root vbmeta
partitions.

Test: m fastboot_info, fastboot flashall
Bug: 299440104
Change-Id: I4910008635b16c4f4194ebd45da26bd1a8875fc1
diff --git a/core/Makefile b/core/Makefile
index f1b2d29..29c727a 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -5588,7 +5588,7 @@
 	$(hide) echo "flash vbmeta_system" >> $@
 endif
 ifneq (,$(strip $(BOARD_AVB_VBMETA_VENDOR)))
-	$(hide) echo "flash --apply-vbmeta vbmeta_vendor" >> $@
+	$(hide) echo "flash vbmeta_vendor" >> $@
 endif
 ifneq (,$(strip $(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)))
 	$(hide) $(foreach partition,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS), \