Remove internal only methods from wxDataViewEvent documentation.

SetDataXXX() methods are only meant to be used by wxDataViewCtrl itself, so
don't document them as part of public API. Their documentation was pretty
useless anyhow as it didn't say anything not already contained in the method
name.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71321 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/dataview.h

@@ -2996,37 +2996,16 @@ public:
     */
     void SetDataObject( wxDataObject *obj );
 
-    /**
-        Used internally. Gets associated wxDataObject for data transfer
-        within a drag operation.
-    */
-    wxDataObject *GetDataObject() const;
-
-    /**
-        Used internally. Sets the wxDataFormat during a drop operation.
-    */
-    void SetDataFormat( const wxDataFormat &format );
-
     /**
         Gets the wxDataFormat during a drop operation.
     */
     wxDataFormat GetDataFormat() const;
 
-    /**
-        Used internally. Sets the data size for a drop data transfer.
-    */
-    void SetDataSize( size_t size );
-
     /**
         Gets the data size for a drop data transfer.
     */
     size_t GetDataSize() const;
 
-    /**
-        Used internally. Sets the data buffer for a drop data transfer.
-    */
-    void SetDataBuffer( void* buf );
-
     /**
         Gets the data buffer for a drop data transfer.
     */