(PS3 Cg) Fixed crash at game start - Cg state was never properly

deinited for PS3 before and we relied on a very dirty hack to set
CgContext to NULL - we can get rid of all that crap now.

PS3 build is now 'fixed' - only thing remaining is that we should
have a mechanism inside the menu to 'reinit' any graphics assets that
were previously set before we lost the state (for instance - RMenu
has one texture image it loads at init_assets time).

gfx/gl.c

@@ -2644,9 +2644,6 @@ static void gl_restart(void)
    void *data = driver.video_data;
    driver.video_data = NULL;
    gl_free(data);
-#ifdef HAVE_CG
-   gl_cg_invalidate_context();
-#endif
    init_video_input();
 }
 #endif

gfx/shader_cg.c

@@ -396,15 +396,12 @@ static void gl_cg_deinit_state(void)
 // Final deinit.
 static void gl_cg_deinit_context_state(void)
 {
-   // Destroying context breaks on PS3 for some unknown reason.
-#ifndef __CELLOS_LV2__
    if (cgCtx)
    {
       RARCH_LOG("CG: Destroying context.\n");
       cgDestroyContext(cgCtx);
       cgCtx = NULL;
    }
-#endif
 }
 
 // Full deinit.
@@ -940,11 +937,6 @@ static struct gfx_shader *gl_cg_get_current_shader(void)
    return cg_active ? cg_shader : NULL;
 }
 
-void gl_cg_invalidate_context(void)
-{
-   cgCtx = NULL;
-}
-
 const gl_shader_backend_t gl_cg_backend = {
    gl_cg_init,
    gl_cg_deinit,

gfx/shader_cg.h

@@ -20,7 +20,6 @@
 #include "shader_common.h"
 #include <stdint.h>
 
-void gl_cg_invalidate_context(void); // Call when resetting GL context on PS3.
 extern const gl_shader_backend_t gl_cg_backend;
 
 #endif