This reverts commit ed851f13, the underlying
problem causing JunitTest_sc_unoapi's

> checking: [sc.ScModelObj::com::sun::star::sheet::XDocumentAuditing] is iface: [com.sun.star.sheet.XDocumentAuditing] testcode: [ifc.sheet._XDocumentAuditing]
> Shape Type: com.sun.star.drawing.LineShape
> LOG> Execute: refreshArrows()
> Shape Type: com.sun.star.drawing.LineShape
> Shape Type: com.sun.star.drawing.LineShape
> Method refreshArrows() finished with state OK

to fail appears to be fixed meanwhile.