selftests/nolibc: remove the duplicated gettimeofday_bad2

There were two exactly similar occurrences of this test.

Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>