vk/runtime: drop incorrect UNUSED annotation

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
cc: mesa-stable

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19458>
(cherry picked from commit c6c5949ff7)

.pick_status.json

@@ -1732,7 +1732,7 @@
         "description": "vk/runtime: drop incorrect UNUSED annotation",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null
     },

src/vulkan/runtime/vk_device.c

@@ -197,7 +197,7 @@ vk_device_init(struct vk_device *device,
 }
 
 void
-vk_device_finish(UNUSED struct vk_device *device)
+vk_device_finish(struct vk_device *device)
 {
    /* Drivers should tear down their own queues */
    assert(list_is_empty(&device->queues));