Remove wxOSX/Carbon support.

Cocoa has been the default toolkit in wxWidgets for a long time. There is really no good reason to use Carbon in 2016 and this removes a lot of unused and unmaintained code.

src/osx/dataview_osx.cpp

@@ -19,9 +19,6 @@
     #include "wx/dcclient.h"
     #include "wx/icon.h"
 #endif
-#if wxOSX_USE_CARBON
-#include "wx/osx/carbon/dataview.h"
-#endif
 
 #include "wx/osx/core/dataview.h"
 #include "wx/osx/private.h"
@@ -736,52 +733,6 @@ wxSize wxDataViewCtrl::DoGetBestSize() const
 void wxDataViewCtrl::OnMouse(wxMouseEvent& event)
 {
     event.Skip();
-
-#if wxOSX_USE_CARBON
-    if (GetModel() == NULL)
-        return;
-
-    wxMacDataViewDataBrowserListViewControlPointer MacDataViewListCtrlPtr(dynamic_cast<wxMacDataViewDataBrowserListViewControlPointer>(GetPeer()));
-
-    int NoOfChildren;
-    wxDataViewItemArray items;
-    NoOfChildren = GetModel()->GetChildren( wxDataViewItem(), items);
-    if (NoOfChildren == 0)
-       return;
-    wxDataViewItem firstChild = items[0];
-
-    UInt16 headerHeight = 0;
-    MacDataViewListCtrlPtr->GetHeaderButtonHeight(&headerHeight);
-
-
-    if (event.GetY() < headerHeight)
-    {
-       unsigned int col_count = GetColumnCount();
-       unsigned int col;
-       for (col = 0; col < col_count; col++)
-       {
-           wxDataViewColumn *column = GetColumn( col );
-           if (column->IsHidden())
-              continue;
-
-           Rect itemrect;
-           ::GetDataBrowserItemPartBounds( MacDataViewListCtrlPtr->GetControlRef(),
-              reinterpret_cast<DataBrowserItemID>(firstChild.GetID()), column->GetNativeData()->GetPropertyID(),
-              kDataBrowserPropertyEnclosingPart, &itemrect );
-
-           if (abs( event.GetX() - itemrect.right) < 3)
-           {
-               if (column->GetFlags() & wxDATAVIEW_COL_RESIZABLE)
-                  SetCursor( wxCursor( wxCURSOR_SIZEWE ) );
-               else
-                  SetCursor( *wxSTANDARD_CURSOR );
-               return;
-           }
-       }
-
-    }
-    SetCursor( *wxSTANDARD_CURSOR );
-#endif
 }
 
 wxIMPLEMENT_DYNAMIC_CLASS(wxDataViewCtrl,wxDataViewCtrlBase);