configs/at91sam9260eknf: remove defconfig, broken

This defconfig no longer builds:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/11161167596

It is still based on the 4.8.6 kernel, which is not even an LTS
kernel, so we cannot easily update to fix the issues which are most
likely due to the newer gcc/binutils versions we're using now.

There is no DEVELOPERS entry attached to this configuration as well,
and this defconfig has been broken for at least 2 months, probably
more (our Gitlab CI history is only kept for ~2 months). So let's drop
it, unles someone volunteers to resurrect it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

.checkpackageignore

@@ -87,7 +87,6 @@ configs/arcturus_ucls1012a_defconfig lib_defconfig.ForceCheckHash
 configs/arcturus_ucp1020_defconfig lib_defconfig.ForceCheckHash
 configs/asus_tinker-s_rk3288_defconfig lib_defconfig.ForceCheckHash
 configs/asus_tinker_rk3288_defconfig lib_defconfig.ForceCheckHash
-configs/at91sam9260eknf_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d27_som1_ek_mmc_dev_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d2_xplained_mmc_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d2_xplained_mmc_dev_defconfig lib_defconfig.ForceCheckHash

configs/at91sam9260eknf_defconfig

@@ -1,20 +0,0 @@
-BR2_arm=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_8=y
-BR2_LINUX_KERNEL=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.8.6"
-BR2_LINUX_KERNEL_DEFCONFIG="at91_dt"
-BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="at91sam9260ek"
-BR2_TARGET_ROOTFS_UBI=y
-BR2_TARGET_AT91BOOTSTRAP3=y
-BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_GIT=y
-BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_REPO_URL="https://github.com/linux4sam/at91bootstrap.git"
-BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_REPO_VERSION="v3.10.3"
-BR2_TARGET_AT91BOOTSTRAP3_DEFCONFIG="at91sam9260eknf_uboot"
-BR2_TARGET_UBOOT=y
-BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2016.09.01"
-BR2_TARGET_UBOOT_BOARD_DEFCONFIG="at91sam9260ek_nandflash"
-BR2_PACKAGE_HOST_SAM_BA=y