.. hori/vert lines only"

This reverts commit f8b4d371. Tomaz
considers this ugly and it's no longer needed since commit
93abdf39 (sw lok: assume no windows in
SwLayoutFrame::PaintSwFrame(), 2019-05-14).

(cherry picked from commit 35ab8387)

Conflicts:
	basegfx/test/B2DPolygonTest.cxx
	drawinglayer/source/processor2d/vclpixelprocessor2d.cxx

Change-Id: Ia9b29921ff3e5d82085e1abf9f39c172357a5e13
Reviewed-on: https://gerrit.libreoffice.org/72343Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>