chore: drop efi runtime services test framework

Drop the EFI runtime services test framework.

Ref: https://cateee.net/lkddb/web-lkddb/EFI_TEST.html

Signed-off-by: Noel Georgi <git@frezbo.dev>

kernel/build/config-arm64

@@ -2078,7 +2078,7 @@ CONFIG_EFI_GENERIC_STUB=y
 CONFIG_EFI_ARMSTUB_DTB_LOADER=y
 CONFIG_EFI_BOOTLOADER_CONTROL=y
 CONFIG_EFI_CAPSULE_LOADER=y
-CONFIG_EFI_TEST=y
+# CONFIG_EFI_TEST is not set
 CONFIG_RESET_ATTACK_MITIGATION=y
 # CONFIG_EFI_DISABLE_PCI_DMA is not set
 CONFIG_EFI_EARLYCON=y