libxbps: remove csh alternate match code.
libxbps: remove csh alternate match code.

This code won't be used in XBPS and only slowdowns
xbps_pkgpattern_match().

datenwolf/xbps,datenwolf/xbps,ebfe/xbps,datenwolf/xbps,stpx/xbps,ebfe/xbps,stpx/xbps,stpx/xbps,ebfe/xbps