gpu: ipu-v3: Remove unused ipu_vdi_unsetup

ipu_vdi_unsetup() was added in 2016 by
commit 2d2ead45 ("gpu: ipu-v3: Add Video Deinterlacer unit")
but has remained unused.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241226022752.219399-6-linux@treblig.org


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>