Don't explicitly protect against non-monotonic gettimeofday.
Don't explicitly protect against non-monotonic gettimeofday.

Since we're now protecting against non-monotonic time unconditionally,
there's no need for additional protection in the gettimeofday case.

wujf/libutp,robgjansen/libutp,robgjansen/libutp,anacrolix/go-libutp,bittorrent/libutp,wujf/libutp,anacrolix/go-libutp,wujf/libutp,bittorrent/libutp,bittorrent/libutp,robgjansen/libutp,anacrolix/go-libutp,anacrolix/go-libutp