SvListAction::REVERSING is unused

Change-Id: I188fbdd3855abff340790451e3939d2486067180
Reviewed-on: https://gerrit.libreoffice.org/64922
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/vcl/treelist.hxx

@@ -45,7 +45,6 @@ enum class SvListAction
     RESORTING        = 9,
     RESORTED         = 10,
     CLEARED          = 11,
-    REVERSING        = 12,
     REVERSED         = 13
 };
 

vcl/source/treelist/treelist.cxx

@@ -1334,8 +1334,6 @@ void SvListView::ModelNotification( SvListAction nActionId, SvTreeListEntry* pEn
             break;
         case SvListAction::RESORTING:
             break;
-        case SvListAction::REVERSING:
-            break;
         case SvListAction::REVERSED:
             m_pImpl->m_bVisPositionsValid = false;
             break;
@@ -1451,7 +1449,6 @@ void SvTreeList::ResortChildren( SvTreeListEntry* pParent )
 
 void SvTreeList::Reverse()
 {
-    Broadcast(SvListAction::REVERSING);
     bAbsPositionsValid = false;
     ReverseChildren(pRootItem.get());
     Broadcast(SvListAction::REVERSED);