Revert "Add vp9_quantize_fp_nz_c()"
Revert "Add vp9_quantize_fp_nz_c()"

This reverts commit 86842855d30d6ca6befdcf5108003e027d90daa9.

SSSE3/VP9QuantizeTest.EOBCheck/1 fails on Mac and the build breaks under
visual studio due to a #if within another macro.

Change-Id: I475095a04aafcc714fade2b24e4df7b682be2cd1

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