Unused ColorDepth was removed.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Tested-by: Christian Ehrhardt <ehrhardt@genua.de>
(cherry picked from commit 043944c550
)