[PATCH -next] drm/qxl: remove set but not used variable 'bo_old'

[Gerd Hoffmann]

On Mon, Feb 18, 2019 at 08:54:59AM +0000, YueHaibing wrote:
> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> drivers/gpu/drm/qxl/qxl_display.c: In function 'qxl_primary_atomic_update':
> drivers/gpu/drm/qxl/qxl_display.c:538:17: warning:
>  variable 'bo_old' set but not used [-Wunused-but-set-variable]
> 
> It's not used any more after 4979904c62b9 ("drm/qxl: use shadow bo directly")

Pushed to drm-misc-next.

thanks,
  Gerd