ar71xx: image: drop unused mtdlayouts from legacy.mk

Signed-off-by: Piotr Dymacz <[email protected]>

target/linux/ar71xx/image/legacy.mk

@@ -264,9 +264,6 @@ f9k1115v2_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env),14464k(rootfs
 dlrtdev_mtdlayout=mtdparts=spi0.0:256k(uboot)ro,64k(config)ro,6208k(firmware),64k(caldata)ro,640k(certs),960k(unknown)ro,64k@0x7f0000(caldata_copy)
 dlrtdev_mtdlayout_fat=mtdparts=spi0.0:256k(uboot)ro,64k(config)ro,7168k(firmware),640k(certs),64k(caldata)ro,64k@0x660000(caldata_orig),6208k@0x50000(firmware_orig)
 planex_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,7744k(firmware),128k(art)ro
-ubntxm_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,7552k(firmware),256k(cfg)ro,64k(EEPROM)ro
-uap_pro_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,1536k(kernel),14208k(rootfs),256k(cfg)ro,64k(EEPROM)ro,15744k@0x50000(firmware)
-ubdev_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,7488k(firmware),64k(certs),256k(cfg)ro,64k(EEPROM)ro
 whrhpg300n_mtdlayout=mtdparts=spi0.0:248k(u-boot)ro,8k(u-boot-env)ro,3712k(firmware),64k(art)ro
 wlr8100_mtdlayout=mtdparts=spi0.0:192k(u-boot)ro,64k(u-boot-env)ro,1408k(kernel),14080k(rootfs),192k(unknown)ro,64k(art)ro,384k(unknown2)ro,15488k@0x40000(firmware)
 wndap360_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,7744k(firmware),64k(nvram)ro,64k(art)ro