Remove uncrustify config and reformat-all.sh

Replaced with clang-format.

Change-Id: I15d4946800cbfaead67a73450ff3b12193814e54
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20250805165906.30010-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg32543.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

Author: flichtenheld