(Hevc/xIT):Removing useless actions.
(Hevc/xIT): Not using Block_Merge for 16x16 Pu.
(Hevc/xIT): Not using Block_Merge for 8x8 and 4x4 Pu.
(Hevc/xIT): Removing useless actor.
(Hevc/xIT): Reducing repeat size and cleaning up.