kunit/fortify: Remove __kmalloc_node() test

__kmalloc_node() is considered an "internal" function to the Slab, so
drop it from explicit testing.

Link: https://lore.kernel.org/r/20240531185703.work.588-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>

lib/fortify_kunit.c

@@ -235,9 +235,6 @@ static void fortify_test_alloc_size_##allocator##_dynamic(struct kunit *test) \
 		kmalloc_array_node(alloc_size, 1, gfp, NUMA_NO_NODE),	\
 		kfree(p));						\
 	checker(expected_size, __kmalloc(alloc_size, gfp),		\
-		kfree(p));						\
-	checker(expected_size,						\
-		__kmalloc_node(alloc_size, gfp, NUMA_NO_NODE),		\
 		kfree(p));						\
 									\
 	orig = kmalloc(alloc_size, gfp);				\