Revert "Fix sycc{420,422}_to_rgb issues."
Revert "Fix sycc{420,422}_to_rgb issues."

This reverts commit 48b934135171b55b1ffc510226317fdddef5f5b8.

Broke unit tests.

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1800153002 .

DrAlexx/pdfium,DrAlexx/pdfium,DrAlexx/pdfium,DrAlexx/pdfium