Removing r_stereo and r_stereoSeperation

removed r_stereo from tr_local.h

removed cg_stereoSeperation from cg_local.h
removed cg_stereoSeperation from cg_main.c

removed cg_stereoSeperation from cg_draw.c

removed cg_stereoSeperation from tr_types.h

removed an r_stereo from tr_init.cpp

Built and ran game successfully