Remove ccmds and config file bindings for weapon_preferences array entries and make it static to p_pspr.cpp (for now).

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2569 86ba831e-150c-0410-ab35-e06eaae15ed9
Remove now redundant multidimensional extension of weapon_preferences to two rows. The array itself can stay in place as it is now until the EDF weapon system takes full form and replaces it with extensible logic.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2570 86ba831e-150c-0410-ab35-e06eaae15ed9