testsuite: remove now unused array of tests

Remove the arrays and let each test with a guaranteed unique name.
diff --git a/testsuite/test-util.c b/testsuite/test-util.c
index 5e4fb0e..9ffcf56 100644
--- a/testsuite/test-util.c
+++ b/testsuite/test-util.c
@@ -97,10 +97,4 @@
 		.out = TESTSUITE_ROOTFS "test-util/freadline_wrapped-correct.txt",
 	});
 
-static const struct test *tests[] = {
-	&salias_1,
-	&stest_freadline_wrapped,
-	NULL,
-};
-
-TESTSUITE_MAIN(tests);
+TESTSUITE_MAIN();