crashtesting: remove old fix for ooo55381-1.sxw

this reverts

commit 9eb16c85
Author: Caolán McNamara <caolanm@redhat.com>
Date:   Wed Jun 3 14:15:03 2015 +0100

    don't crash on layout of ooo55381-1.sxw

    The pLay here is getting joined and thus deleted in a stack of
    FormatLayoutTabs so set it as unjoinable for the duration that
    we expect pLay to remain valid

because ooo31216-2.doc fdo57780-2.doc rhbz193771-1.doc assert when converting
it to a more conservative SwFrmDeleteGuard. They would leave the function
safely on the early return if the delete was allowed, so go more conservative
again and restore to the original logic.

ooo55381-1.sxw continues to apparently not fail.

sw/source/core/layout/layact.cxx

@@ -1374,7 +1374,6 @@ bool SwLayAction::FormatLayout( OutputDevice *pRenderContext, SwLayoutFrm *pLay,
     if ( pLay->IsFootnoteFrm() ) // no LayFrms as Lower
         return bChanged;
 
-    SwFrmDeleteGuard aDeleteGuard(pLay);
     SwFrm *pLow = pLay->Lower();
     bool bTabChanged = false;
     while ( pLow && pLow->GetUpper() == pLay )