arg.h: remove unused macros
arg.h: remove unused macros

ARGUM isn't used and ARGNUMF uses estrtol() that isn't defined anywhere.
Those were probably copied from sbase arg.h.

Signed-off-by: Christoph Lohmann <80554d406dcaab4b48b5b2e6ac7b25e86705c9c0@r-36.net>

google/mt,google/mt