media: videobuf2: core: Drop unneeded forward declaration

The static __enqueue_in_driver() function is forward-declared
needlessly, as it isn't called before its definition. Drop the forward
declaration.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>

drivers/media/common/videobuf2/videobuf2-core.c

@@ -199,7 +199,6 @@ module_param(debug, int, 0644);
 })
 
 static void __vb2_queue_cancel(struct vb2_queue *q);
-static void __enqueue_in_driver(struct vb2_buffer *vb);
 
 static const char *vb2_state_name(enum vb2_buffer_state s)
 {