media: hantro: Remove dedicated control documentation

The dedicated control required by the HEVC support
was removed, and the driver now calculates the value
internally. Remove the ad-hoc documentation as well.

[hverkuil: remove hantro from Documentation/userspace-api/media/drivers/index.rst]

Fixes: 3360755e ("media: hantro: Stop using Hantro dedicated control")
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Documentation/userspace-api/media/drivers/hantro.rst

-.. SPDX-License-Identifier: GPL-2.0
-
-Hantro video decoder driver
-===========================
-
-The Hantro video decoder driver implements the following driver-specific controls:
-
-``V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP (integer)``
-    Specifies to Hantro HEVC video decoder driver the number of data (in bits) to
-    skip in the slice segment header.
-    If non-IDR, the bits to be skipped go from syntax element "pic_output_flag"
-    to before syntax element "slice_temporal_mvp_enabled_flag".
-    If IDR, the skipped bits are just "pic_output_flag"
-    (separate_colour_plane_flag is not supported).
-
-.. note::
-
-        This control is not yet part of the public kernel API and
-        it is expected to change.

Documentation/userspace-api/media/drivers/index.rst

@@ -33,7 +33,6 @@ For more details see the file COPYING in the source distribution of Linux.
 
 	ccs
 	cx2341x-uapi
-        hantro
 	imx-uapi
 	max2175
 	meye-uapi