ath79: revert erroneous second addition of files for WNDR4300

There are two recent commits stating to add support for Netgear
WNDR4300, where the second one seems to be just leftover from
an earlier patch having been rebased.

Since the first patch already provides support in the most recent
state, just revert the second one.

This reverts commit cd87272eb2.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ath79/image/Makefile

@@ -77,7 +77,6 @@ include ./generic-ubnt.mk
 endif
 ifeq ($(SUBTARGET),nand)
 include ./nand.mk
-include ./nand-netgear.mk
 endif
 ifeq ($(SUBTARGET),tiny)
 include ./tiny.mk

target/linux/ath79/image/nand-netgear.mk

@@ -1,34 +0,0 @@
-include ./common-netgear.mk	# for netgear-uImage
-
-# (pad-offset 129 = 2 * uimage_header + 0xff)
-define Device/netgear_ath79_nand
-  DEVICE_VENDOR := NETGEAR
-  DEVICE_PACKAGES := kmod-usb2 kmod-usb-ledtrig-usbport
-  KERNEL_SIZE := 2048k
-  BLOCKSIZE := 128k
-  PAGESIZE := 2048
-  IMAGE_SIZE := 25600k
-  KERNEL := kernel-bin | append-dtb | lzma -d20 | \
-	pad-offset $$(KERNEL_SIZE) 129 | \
-	netgear-uImage lzma | append-string -e '\xff' | \
-	append-uImage-fakehdr filesystem $$(NETGEAR_KERNEL_MAGIC)
-  KERNEL_INITRAMFS := kernel-bin | append-dtb | lzma -d20 | \
-	netgear-uImage lzma
-  IMAGES := ubi-sysupgrade.bin ubi-factory.img
-  IMAGE/ubi-factory.img := append-kernel | append-ubi | netgear-dni | \
-	check-size $$$$(IMAGE_SIZE)
-  IMAGE/ubi-sysupgrade.bin := sysupgrade-tar | append-metadata | \
-	check-size $$$$(IMAGE_SIZE)
-  UBINIZE_OPTS := -E 5
-endef
-
-define Device/netgear_wndr4300
-  ATH_SOC := ar9344
-  DEVICE_MODEL := WNDR4300
-  NETGEAR_KERNEL_MAGIC := 0x33373033
-  NETGEAR_BOARD_ID := WNDR4300
-  NETGEAR_HW_ID := 29763948+0+128+128+2x2+3x3
-  SUPPORTED_DEVICES += wndr4300
-  $(Device/netgear_ath79_nand)
-endef
-TARGET_DEVICES += netgear_wndr4300