converted smooth-lighting into a primitive

for the first time ever, smooth-lit cave mode is now possible \o/

overviewer_core/src/rendermodes.h

@@ -117,21 +117,6 @@ typedef struct {
 } RenderModeOverlay;
 extern RenderModeInterface rendermode_overlay;
 
-/* exposed so it can be used in other per-face occlusion checks */
-int rendermode_lighting_is_face_occluded(RenderState *state, int skip_sides, int x, int y, int z);
-
-/* exposed so sub-modes can look at colors directly */
-void get_lighting_color(RenderModeLighting *self, RenderState *state,
-                        int x, int y, int z,
-                        unsigned char *r, unsigned char *g, unsigned char *b);
-
-/* SMOOTH LIGHTING */
-typedef struct {
-    /* inherits from lighting */
-    RenderModeLighting parent;
-} RenderModeSmoothLighting;
-extern RenderModeInterface rendermode_smooth_lighting;
-
 /* SPAWN */
 typedef struct {
     /* inherits from overlay */