Merge two wxDataViewWidgetImpl::Remove() overloads into one

Having 2 different overloads might have been useful for Carbon
implementation, but as they do exactly the same thing in the Cocoa
version, leave only one of them -- and don't pass it the item, or items,
being deleted as they're not used anyhow.

No real changes.

include/wx/osx/cocoa/dataview.h

@@ -486,10 +486,7 @@ public:
     virtual wxDataViewItem GetTopItem() const;
     virtual bool IsExpanded(const wxDataViewItem& item) const;
     virtual bool Reload();
-    virtual bool Remove(const wxDataViewItem& parent,
+    virtual bool Remove(const wxDataViewItem& parent);
-                        const wxDataViewItem& item);
-    virtual bool Remove(const wxDataViewItem& parent,
-                        const wxDataViewItemArray& item);
     virtual bool Update(const wxDataViewColumn* columnPtr);
     virtual bool Update(const wxDataViewItem& parent,
                         const wxDataViewItem& item);

include/wx/osx/core/dataview.h

@@ -68,8 +68,7 @@ public:
   virtual wxDataViewItem GetTopItem (void) const                                                     = 0; // get top-most visible item
   virtual bool         IsExpanded   (wxDataViewItem const& item) const                               = 0; // checks if the passed item is expanded in the native control
   virtual bool         Reload       (void)                                                           = 0; // clears the native control and reloads all data
-  virtual bool         Remove       (wxDataViewItem const& parent, wxDataViewItem const& item)       = 0; // removes an item from the native control
+  virtual bool         Remove       (wxDataViewItem const& parent)                                   = 0; // removes one or more items under the given parent from the native control
-  virtual bool         Remove       (wxDataViewItem const& parent, wxDataViewItemArray const& item)  = 0; // removes items from the native control
   virtual bool         Update       (wxDataViewColumn const* columnPtr)                              = 0; // updates the items in the passed column of the native control
   virtual bool         Update       (wxDataViewItem const& parent, wxDataViewItem const& item)       = 0; // updates the passed item in the native control
   virtual bool         Update       (wxDataViewItem const& parent, wxDataViewItemArray const& items) = 0; // updates the passed items in the native control

src/osx/cocoa/dataview.mm

@@ -2339,16 +2339,7 @@ bool wxCocoaDataViewControl::Reload()
     return true;
 }
 
-bool wxCocoaDataViewControl::Remove(const wxDataViewItem& parent, const wxDataViewItem& WXUNUSED(item))
+bool wxCocoaDataViewControl::Remove(const wxDataViewItem& parent)
-{
-    if (parent.IsOk())
-        [m_OutlineView reloadItem:[m_DataSource getDataViewItemFromBuffer:parent] reloadChildren:YES];
-    else
-        [m_OutlineView reloadData];
-    return true;
-}
-
-bool wxCocoaDataViewControl::Remove(const wxDataViewItem& parent, const wxDataViewItemArray& WXUNUSED(item))
 {
     if (parent.IsOk())
         [m_OutlineView reloadItem:[m_DataSource getDataViewItemFromBuffer:parent] reloadChildren:YES];

src/osx/dataview_osx.cpp

@@ -170,7 +170,7 @@ bool wxOSXDataViewModelNotifier::ItemDeleted(wxDataViewItem const& parent, wxDat
  // to prevent the control trying to ask the model to update an already deleted item the control is informed that currently a deleting process
  // has been started and that variables can currently not be updated even when requested by the system:
   m_DataViewCtrlPtr->SetDeleting(true);
-  noFailureFlag = m_DataViewCtrlPtr->GetDataViewPeer()->Remove(parent,item);
+  noFailureFlag = m_DataViewCtrlPtr->GetDataViewPeer()->Remove(parent);
  // enable automatic updating again:
   m_DataViewCtrlPtr->SetDeleting(false);
 
@@ -179,7 +179,7 @@ bool wxOSXDataViewModelNotifier::ItemDeleted(wxDataViewItem const& parent, wxDat
   return noFailureFlag;
 }
 
-bool wxOSXDataViewModelNotifier::ItemsDeleted(wxDataViewItem const& parent, wxDataViewItemArray const& items)
+bool wxOSXDataViewModelNotifier::ItemsDeleted(wxDataViewItem const& parent, wxDataViewItemArray const& WXUNUSED(items))
 {
   bool noFailureFlag;
 
@@ -190,7 +190,7 @@ bool wxOSXDataViewModelNotifier::ItemsDeleted(wxDataViewItem const& parent, wxDa
  // has been started and that variables can currently not be updated even when requested by the system:
   m_DataViewCtrlPtr->SetDeleting(true);
  // delete all specified items:
-  noFailureFlag = m_DataViewCtrlPtr->GetDataViewPeer()->Remove(parent,items);
+  noFailureFlag = m_DataViewCtrlPtr->GetDataViewPeer()->Remove(parent);
  // enable automatic updating again:
   m_DataViewCtrlPtr->SetDeleting(false);