Merge to XFA: Remove unused CPDFSDK_InterForm::DoFDFBuffer.

This method isn't used anywhere and the implementation doesn't really do
anything.

TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1405163003 .

(cherry picked from commit 162f227af9c5e28885a36e6ca06a09c12c6223e0)

Review URL: https://codereview.chromium.org/1416283002 .
2 files changed