Originally added with 78e8d5f0 "Added option to
hide external link buttons on Start Center".
The use of BackingWindow::mnHideExternalLinks was remove with
74144e53 "startcenter: Tweak Start Center
layout", and then the member and its initialization from the
StartCenterHideExternalLinks configuration property was removed with
d7824bf1 "loplugin:unusedfields in sfx2 part2".
(The opportunity to already remove STARTCENTER_HIDE_EXTERNAL_LINKS from
instsetoo_native/util/openoffice.lst.in had been missed in
89ac3c4a "replace variables in main.xcd already
Reviewed-on: https://gerrit.libreoffice.org/55379Tested-by: Jenkins <firstname.lastname@example.org>
Reviewed-by: Stephan Bergmann <email@example.com>