I prevent WordPress from generating
large image sizes for images I upload to the Media Library, by setting their dimensions to
0 from the dashboard:
Settings -> Media panel.
I have also gotten rid of all instances of
set_post_thumbnail_size from the
functions.php file of my theme.
However, when I upload new images, WordPress is still generating a
768px width version (called 'medium_large') from my original full size image. I believe it has something to do with this update.
Is there is any way to prevent this from happening?