FontSizeMenuController::fillPopupMenu() built a printer and a font list
using it. Neither were used after the change from
pFontList->GetSizeAry() to FontList::GetStdSizeAry().
This construction ran once per context menu activation where it runs
through the printer driver on Windows. Hence, the delay was not present
on Linux.
Change-Id: Ia0d9bd6b789f6b99437e97373421cb13a744a9da
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/210516
Tested-by: Jenkins
Reviewed-by: Andreas Heinisch <andreas.heinisch@yahoo.de>