delete stale TODO comment--this is now done

Author: embray

SEFramework/src/lib/ASDF/AsdfImageSource.cpp

@@ -114,7 +114,6 @@ void AsdfImageSource::setLayer(int layer) {
 
 
 std::shared_ptr<ImageTile> AsdfImageSource::getImageTile(int x, int y, int width, int height) const {
-  // TODO: (#5) support image data type conversion
   auto tile = ImageTile::create(m_image_type, x, y, width, height,
                                 std::const_pointer_cast<ImageSource>(shared_from_this()));
   m_ndarray->fillImageTile(tile, m_current_layer);