mudp/mtcp: Remove -Wconversion pragmas

mudp/mtcp: Remove -Wconversion pragmas

These were implictly fixed by the fixes to
the hash API in commit
a69aac41c4b2ccff1084736c158d7cf8474be533.
("list: Make types of hash elements consistent")

Change-Id: Iacec5920cdc3e16aaf777f843ef1f4a00a6a9043
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1324
Message-Id: <20251030145124.2607-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg34035.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>