How can I stop WP media uploader from creating duplicates of my uploaded images?

I believe the following should stop thumbnails from being created. If you’re wanting to remove some then and unset the $size[{size}]. Following sizes are there “thumbnail”,”medium”,”large”,”post-thumbnail”.

add_filter('intermediate_image_sizes_advanced','stop_thumbs');
function stop_thumbs($sizes){
      return array();
}