selftests/bpf: Clean up dynptr prog_tests

Clean up prog_tests/dynptr.c by removing the unneeded "expected_err_msg"
in the dynptr_tests struct, which is a remnant from converting the fail
tests cases to use the generic verification tester.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Link: https://lore.kernel.org/r/20230214051332.4007131-2-joannelkoong@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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

@@ -5,14 +5,10 @@
 #include "dynptr_fail.skel.h"
 #include "dynptr_success.skel.h"
 
-static struct {
-	const char *prog_name;
-	const char *expected_err_msg;
-} dynptr_tests[] = {
-	/* success cases */
-	{"test_read_write", NULL},
-	{"test_data_slice", NULL},
-	{"test_ringbuf", NULL},
+static const char * const success_tests[] = {
+	"test_read_write",
+	"test_data_slice",
+	"test_ringbuf",
 };
 
 static void verify_success(const char *prog_name)
@@ -53,11 +49,11 @@ void test_dynptr(void)
 {
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(dynptr_tests); i++) {
-		if (!test__start_subtest(dynptr_tests[i].prog_name))
+	for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
+		if (!test__start_subtest(success_tests[i]))
 			continue;
 
-		verify_success(dynptr_tests[i].prog_name);
+		verify_success(success_tests[i]);
 	}
 
 	RUN_TESTS(dynptr_fail);