selftests/bpf: Fix selftests failure

The kflag is supported now for BTF_KIND_ENUM.
So remove the test which tests verifier failure
due to existence of kflag.
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220607062657.3723737-1-yhs@fb.comSigned-off-by: Alexei Starovoitov <ast@kernel.org>

tools/testing/selftests/bpf/prog_tests/btf.c

@@ -2896,26 +2896,6 @@ static struct btf_raw_test raw_tests[] = {
 	.err_str = "Invalid btf_info kind_flag",
 },
 
-{
-	.descr = "invalid enum kind_flag",
-	.raw_types = {
-		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),		/* [1] */
-		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ENUM, 1, 1), 4),	/* [2] */
-		BTF_ENUM_ENC(NAME_TBD, 0),
-		BTF_END_RAW,
-	},
-	BTF_STR_SEC("\0A"),
-	.map_type = BPF_MAP_TYPE_ARRAY,
-	.map_name = "enum_type_check_btf",
-	.key_size = sizeof(int),
-	.value_size = sizeof(int),
-	.key_type_id = 1,
-	.value_type_id = 1,
-	.max_entries = 4,
-	.btf_load_err = true,
-	.err_str = "Invalid btf_info kind_flag",
-},
-
 {
 	.descr = "valid fwd kind_flag",
 	.raw_types = {