vulkan: remove refcount from vlc_vk_platform_t

I can't think of a use case for this ever being refcounted. It made more
sense back when it held the actual instance, but the platform/surface is
only ever going to be used by whatever also owns the vout_window_t.

modules/video_output/vulkan/platform.c

@@ -27,7 +27,6 @@
 
 #include <vlc_common.h>
 #include <vlc_modules.h>
-#include <vlc_atomic.h>
 
 #include "platform.h"
 
@@ -70,21 +69,12 @@ vlc_vk_platform_t *vlc_vk_platform_Create(struct vout_window_t *wnd, const char
         vlc_object_delete(vk);
         return NULL;
     }
-    vlc_atomic_rc_init(&vk->ref_count);
 
     return vk;
 }
 
-void vlc_vk_platform_Hold(vlc_vk_platform_t *vk)
-{
-    vlc_atomic_rc_inc(&vk->ref_count);
-}
-
 void vlc_vk_platform_Release(vlc_vk_platform_t *vk)
 {
-    if (!vlc_atomic_rc_dec(&vk->ref_count))
-        return;
-
     if (vk->ops)
         vk->ops->close(vk);
 

modules/video_output/vulkan/platform.h

@@ -22,7 +22,6 @@
 #define VLC_VULKAN_PLATFORM_H
 
 #include <vlc_common.h>
-#include <vlc_atomic.h>
 #include <vlc_vout_window.h>
 
 #include <vulkan/vulkan.h>
@@ -44,7 +43,6 @@ typedef struct vlc_vk_platform_t
     // fields internal to platform.c, should not be touched
     struct vlc_object_t obj;
     module_t *module;
-    vlc_atomic_rc_t ref_count;
     void *platform_sys;
     const char *platform_ext;
 
@@ -55,7 +53,6 @@ typedef struct vlc_vk_platform_t
 
 vlc_vk_platform_t *vlc_vk_platform_Create(struct vout_window_t *, const char *) VLC_USED;
 void vlc_vk_platform_Release(vlc_vk_platform_t *);
-void vlc_vk_platform_Hold(vlc_vk_platform_t *);
 
 // Create a vulkan surface and store it to `surface_out`
 static inline int vlc_vk_CreateSurface(vlc_vk_platform_t * vk, VkInstance instance,