clock: adjust/unadjust_with_calibration() have a clock parameter but it's useless
clock: adjust/unadjust_with_calibration() have a clock parameter but it's useless

Document this, for 2.0 we should just remove that parameter.

StreamUtils/gstreamer,centricular/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,centricular/gstreamer