add dx-force-16bpp-zbuffer

panda/src/dxgsg/config_dxgsg.cxx

@@ -60,9 +60,6 @@ bool dx_no_vertex_fog = config_dxgsg.GetBool("dx-no-vertex-fog", false);
 // variable
 bool dx_auto_normalize_lighting = config_dxgsg.GetBool("auto-normalize-lighting", false);
 
-// is this implemented yet?
-bool dx_force_16bpp_screenbuffers = config_dxgsg.GetBool("dx-force-16bpp-screenbuffers", false);
-
 bool dx_show_fps_meter = config_dxgsg.GetBool("show-fps-meter", false);
 float dx_fps_meter_update_interval = max(0.5,config_dxgsg.GetFloat("fps-meter-update-interval", 1.7));
 

panda/src/dxgsg/config_dxgsg.h

@@ -38,7 +38,6 @@ extern const bool link_tristrips;
 // debug flags
 extern bool dx_ignore_mipmaps;
 extern bool dx_mipmap_everything;
-extern bool dx_force_16bpp_screenbuffers;
 extern bool dx_show_transforms;
 
 #ifndef NDEBUG