drm/virtio: Remove unused function declarations

Commit dc5698e8 ("Add virtio gpu driver.") declared but never
implemented virtio_gpu_attach_status_page()/virtio_gpu_detach_status_page()
Also commit 62fb7a5e ("virtio-gpu: add 3d/virgl support")
declared but never implemented virtio_gpu_fence_ack() and
virtio_gpu_dequeue_fence_func().
Commit c84adb30 ("drm/virtio: Support virtgpu exported resources")
declared but never implemented virtgpu_gem_prime_get_uuid().
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230811101823.32344-1-yuehaibing@huawei.com

drivers/gpu/drm/virtio/virtgpu_drv.h

@@ -344,8 +344,6 @@ void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
 			      struct virtio_gpu_object *obj,
 			      struct virtio_gpu_mem_entry *ents,
 			      unsigned int nents);
-int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
-int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
 			    struct virtio_gpu_output *output);
 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
@@ -394,11 +392,8 @@ virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
 				  struct virtio_gpu_fence *fence);
 void virtio_gpu_ctrl_ack(struct virtqueue *vq);
 void virtio_gpu_cursor_ack(struct virtqueue *vq);
-void virtio_gpu_fence_ack(struct virtqueue *vq);
 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
 void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
-void virtio_gpu_dequeue_fence_func(struct work_struct *work);
-
 void virtio_gpu_notify(struct virtio_gpu_device *vgdev);
 
 int
@@ -465,8 +460,6 @@ struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
 					 int flags);
 struct drm_gem_object *virtgpu_gem_prime_import(struct drm_device *dev,
 						struct dma_buf *buf);
-int virtgpu_gem_prime_get_uuid(struct drm_gem_object *obj,
-			       uuid_t *uuid);
 struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
 	struct drm_device *dev, struct dma_buf_attachment *attach,
 	struct sg_table *sgt);