[plugin] Remove Draw_Init from draw funcs

It's never called outside the renderers.

include/QF/plugin/vid_render.h

@@ -108,7 +108,6 @@ typedef struct vid_model_funcs_s {
 } vid_model_funcs_t;
 
 typedef struct vid_render_funcs_s {
-	void (*Draw_Init) (void);
 	void (*Draw_Character) (int x, int y, unsigned ch);
 	void (*Draw_String) (int x, int y, const char *str);
 	void (*Draw_nString) (int x, int y, const char *str, int count);

libs/video/renderer/vid_render_gl.c

@@ -72,7 +72,6 @@ static vid_model_funcs_t model_funcs = {
 };
 
 vid_render_funcs_t gl_vid_render_funcs = {
-	gl_Draw_Init,
 	gl_Draw_Character,
 	gl_Draw_String,
 	gl_Draw_nString,

libs/video/renderer/vid_render_glsl.c

@@ -72,7 +72,6 @@ static vid_model_funcs_t model_funcs = {
 };
 
 vid_render_funcs_t glsl_vid_render_funcs = {
-	glsl_Draw_Init,
 	glsl_Draw_Character,
 	glsl_Draw_String,
 	glsl_Draw_nString,

libs/video/renderer/vid_render_sw.c

@@ -65,7 +65,6 @@ static vid_model_funcs_t model_funcs = {
 };
 
 vid_render_funcs_t sw_vid_render_funcs = {
-	Draw_Init,
 	Draw_Character,
 	Draw_String,
 	Draw_nString,

libs/video/renderer/vid_render_sw32.c

@@ -70,7 +70,6 @@ static vid_model_funcs_t model_funcs = {
 };
 
 vid_render_funcs_t sw32_vid_render_funcs = {
-	sw32_Draw_Init,
 	sw32_Draw_Character,
 	sw32_Draw_String,
 	sw32_Draw_nString,

libs/video/renderer/vid_render_vulkan.c

@@ -194,7 +194,6 @@ static vid_model_funcs_t model_funcs = {
 };
 
 vid_render_funcs_t vulkan_vid_render_funcs = {
-	0,//vulkan_Draw_Init,
 	0,//vulkan_Draw_Character,
 	0,//vulkan_Draw_String,
 	0,//vulkan_Draw_nString,