Shortening the peer timeout was supposedly necessary at some point
to work around an unknown bug. I was not able to reproduce the bug
running a headless Luanti server on WSL Tumbleweed and connecting with
a client on the Windows host. That is not enough to say the issue no
longer exists. This commit may cause a regression.
The access to change the peer timeout was unsynchronized and done by a
different thread than the sending thread, so it was detected by TSan to
be a data race. Since this patch deletes the code performing the write,
the data race is no longer a concern and no synchronization must be
added.
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