- numeric.h: removed unused RPL_HOSTHIDDEN numeric constant


git-svn-id: svn://svn.ircd-hybrid.org/svnroot/ircd-hybrid/branches/8.1.x@3018 82007160-df01-0410-b94d-b575c5fd34c7
- numeric.h: removed some other unused numeric constants as pointed out by Adam


git-svn-id: svn://svn.ircd-hybrid.org/svnroot/ircd-hybrid/branches/8.1.x@3020 82007160-df01-0410-b94d-b575c5fd34c7