drm/doc: remove standard connector props from the csv file

They're properly documented in drm_connector.c now, and this
csv file is a horrible mess. Better to remove it.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170328155349.5972-1-daniel.vetter@ffwll.ch