(orbis) Drop dead orbis_ctx_get_proc_address wrapper

The wrapper's only added value over egl_get_proc_address was a fallback
to sceKernelDlsym(s_piglet_module, ...). The s_piglet_module global is
declared in platform_orbis.c but never assigned anywhere in the tree, so
the fallback was never reachable. The vtable already calls
egl_get_proc_address directly (since 34662e8), making the wrapper
itself unused. Drop the wrapper and its dead extern.

Author: LibretroAdmin

gfx/drivers_context/orbis_ctx.c

@@ -74,7 +74,6 @@ static enum gfx_ctx_api ctx_orbis_api = GFX_CTX_OPENGL_API;
 
 /* TODO/FIXME - global reference */
 extern bool platform_orbis_has_focus;
-extern SceKernelModule s_piglet_module;
 
 void orbis_ctx_destroy(void *data)
 {
@@ -289,17 +288,6 @@ static void orbis_ctx_swap_buffers(void *data)
 #endif
 }
 
-static gfx_ctx_proc_t orbis_ctx_get_proc_address(const char *symbol)
-{
-   gfx_ctx_proc_t ptr_sym = NULL;
-#ifdef HAVE_EGL
-   ptr_sym = egl_get_proc_address(symbol);
-#endif
-   if (!ptr_sym && s_piglet_module > 0)
-      sceKernelDlsym(s_piglet_module, symbol, (void **)&ptr_sym);
-   return ptr_sym;
-}
-
 static void orbis_ctx_bind_hw_render(void *data, bool enable)
 {
 #ifdef HAVE_EGL