configs/atmel_sama5d3xek: remove defconfig, broken

This defconfig no longer builds:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/11161167647

It is still based on the 4.9 kernel, which was LTS but is no longer
maintained.

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.

Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Patrice Vilchez <Patrice.Vilchez@microchip.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

.checkpackageignore

@@ -94,7 +94,6 @@ configs/atmel_sama5d3_xplained_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d3_xplained_dev_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d3_xplained_mmc_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d3_xplained_mmc_dev_defconfig lib_defconfig.ForceCheckHash
-configs/atmel_sama5d3xek_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d4_xplained_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d4_xplained_dev_defconfig lib_defconfig.ForceCheckHash
 configs/atmel_sama5d4_xplained_mmc_defconfig lib_defconfig.ForceCheckHash

configs/atmel_sama5d3xek_defconfig

@@ -1,26 +0,0 @@
-BR2_arm=y
-BR2_cortex_a5=y
-BR2_ARM_ENABLE_VFP=y
-BR2_ARM_INSTRUCTIONS_THUMB2=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y
-BR2_LINUX_KERNEL=y
-BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
-BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,linux4sam,linux-at91,linux4sam_5.8)/linux-linux4sam_5.8.tar.gz"
-BR2_LINUX_KERNEL_DEFCONFIG="sama5"
-BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="sama5d31ek sama5d33ek sama5d34ek sama5d35ek sama5d36ek"
-BR2_TARGET_ROOTFS_UBI=y
-BR2_TARGET_ROOTFS_UBI_SUBSIZE=2048
-BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x1f000
-BR2_TARGET_AT91BOOTSTRAP3=y
-BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_TARBALL=y
-BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_TARBALL_LOCATION="$(call github,linux4sam,at91bootstrap,v3.10.3)/at91bootstrap3-v3.10.3.tar.gz"
-BR2_TARGET_AT91BOOTSTRAP3_DEFCONFIG="sama5d3xeknf_uboot"
-BR2_TARGET_UBOOT=y
-BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
-BR2_TARGET_UBOOT_CUSTOM_TARBALL=y
-BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="$(call github,linux4sam,u-boot-at91,linux4sam_5.8)/u-boot-at91-linux4sam_5.8.tar.gz"
-BR2_TARGET_UBOOT_BOARD_DEFCONFIG="sama5d3xek_nandflash"
-BR2_TARGET_UBOOT_NEEDS_DTC=y
-BR2_TARGET_UBOOT_SPL=y
-BR2_PACKAGE_HOST_SAM_BA=y