Code removed to set images as background

Change-Id: I3bad649b503420e2561483fbce1775e4aebdd3a3
Reviewed-on: https://gerrit.libreoffice.org/45001Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Yousuf Philips <philipz85@hotmail.com>
Tested-by: Yousuf Philips <philipz85@hotmail.com>
Reviewed-by: Heiko Tietze <tietze.heiko@googlemail.com>