Deprecate wxGRIDTABLE_REQUEST_VIEW_{GET,SEND}_VALUES

These grid table requests seem to have been never used and were not doing much
in wxGrid neither, moreover they were never documented, so just stop
supporting them.

src/generic/grid.cpp

@@ -4538,12 +4538,6 @@ bool wxGrid::ProcessTableMessage( wxGridTableMessage& msg )
 {
     switch ( msg.GetId() )
     {
-        case wxGRIDTABLE_REQUEST_VIEW_GET_VALUES:
-            return GetModelValues();
-
-        case wxGRIDTABLE_REQUEST_VIEW_SEND_VALUES:
-            return SetModelValues();
-
         case wxGRIDTABLE_NOTIFY_ROWS_INSERTED:
         case wxGRIDTABLE_NOTIFY_ROWS_APPENDED:
         case wxGRIDTABLE_NOTIFY_ROWS_DELETED:
@@ -5308,51 +5302,6 @@ wxGrid::UpdateBlockBeingSelected(int topRow, int leftCol,
     m_selectedBlockBottomRight = updateBottomRight;
 }
 
-//
-// ------ functions to get/send data (see also public functions)
-//
-
-bool wxGrid::GetModelValues()
-{
-    // Hide the editor, so it won't hide a changed value.
-    HideCellEditControl();
-
-    if ( m_table )
-    {
-        // all we need to do is repaint the grid
-        //
-        m_gridWin->Refresh();
-        return true;
-    }
-
-    return false;
-}
-
-bool wxGrid::SetModelValues()
-{
-    int row, col;
-
-    // Disable the editor, so it won't hide a changed value.
-    // Do we also want to save the current value of the editor first?
-    // I think so ...
-    DisableCellEditControl();
-
-    if ( m_table )
-    {
-        for ( row = 0; row < m_numRows; row++ )
-        {
-            for ( col = 0; col < m_numCols; col++ )
-            {
-                m_table->SetValue( row, col, GetCellValue(row, col) );
-            }
-        }
-
-        return true;
-    }
-
-    return false;
-}
-
 // Note - this function only draws cells that are in the list of
 // exposed cells (usually set from the update region by
 // CalcExposedCells)