vp9: Remove unused function in cyclic refresh
vp9: Remove unused function in cyclic refresh

Change-Id: I4b1d02c661ccbad2a1e346df623e78334a3a3a39

webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx