fdo#76697: Remove this duplicate and use the UNO constant values instead.

(cherry picked from commit 72b2fafebfc44fa90f08cc198e2fa5fc26154c5b)

Conflicts:
	xmloff/source/style/bordrhdl.cxx

This fixes the bug because in XMLBorderHdl::importXML() the value "none"
was rejected as invalid because API_LINE_NONE pointlessly had a
different value than BorderLineStyle::NONE.

Change-Id: Id81aacc6c594ad25d97f6f6dc578ed9ca16549ab
Signed-off-by: Michael Stahl <mstahl@redhat.com>