Revert "msm: vidc: Add description of LTR Extradata"

This reverts commit 8d6d9220e42c7be4eb28825436f37df4fb216b50.
Revert "msm: vidc: Provide qmenu for V4L2_CID_MPEG_VIDC_VIDEO_INTRA_REFRESH_MODE"

This reverts commit ab9b779f5b97c8be9ee64de27a81214815f0db76.