selftests/nolibc: remove outdated comment about construct order

The constructor order is not (and should not) be tested. Remove the
comment.

Fixes: a782d45 ("selftests/nolibc: stop testing constructor order")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://lore.kernel.org/r/20250731201225.323254-3-benjamin@sipsolutions.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>

Author: benzea

tools/testing/selftests/nolibc/nolibc-test.c

@@ -686,7 +686,6 @@ int expect_strtox(int llen, void *func, const char *input, int base, intmax_t ex
 #define CASE_TEST(name) \
 	case __LINE__: llen += printf("%d %s", test, #name);
 
-/* constructors validate that they are executed in definition order */
 __attribute__((constructor))
 static void constructor1(void)
 {