ar71xx: image: remove duplicate IMAGES definition

Signed-off-by: Yousong Zhou <[email protected]>

target/linux/ar71xx/image/Makefile

@@ -88,7 +88,6 @@ define Device/Default
   DEVICE_PROFILE = $$(BOARDNAME)
   PROFILES = Default Minimal $$(DEVICE_PROFILE)
   MTDPARTS :=
-  IMAGES := sysupgrade.bin
   BLOCKSIZE := 64k
   FILESYSTEMS = $(filter-out jffs2-%,$(TARGET_FILESYSTEMS)) jffs2-$$(BLOCKSIZE)
   CONSOLE = ttyS0,115200