Printer should implement ImplPrintMask(), as a protected function. If
OutputDevice calls it, then do nothing.

Also removed commented out code.

Change-Id: If3e7d3b2057f0c89f48f81a4a7a7b2360c0a3439
Reviewed-on: https://gerrit.libreoffice.org/8593Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>