Merge to XFA: Cleanup dead code in CPDF_DIBSource::LoadJpxBitmap() and friends.

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1310603006 .

(cherry picked from commit 097297325e0d3d00556d67885547750a2e9d4b32)

Review URL: https://codereview.chromium.org/1305223010 .
4 files changed