selftests/lkdtm: Remove dead config option

CONFIG_HARDENED_USERCOPY_FALLBACK config option has been removed in
commit 53944f1 ("mm: remove HARDENED_USERCOPY_FALLBACK"). Remove it
from the lkdtm selftest config.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Link: https://lore.kernel.org/r/20220121145154.1795447-1-usama.anjum@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/testing/selftests/lkdtm/config

@@ -3,7 +3,6 @@ CONFIG_DEBUG_LIST=y
 CONFIG_SLAB_FREELIST_HARDENED=y
 CONFIG_FORTIFY_SOURCE=y
 CONFIG_HARDENED_USERCOPY=y
-# CONFIG_HARDENED_USERCOPY_FALLBACK is not set
 CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y
 CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
 CONFIG_UBSAN_BOUNDS=y