Other things that should be removed:

settings/override folder

settings/ezjscore.ini: 1. it overrides preferred lib and 2. the ezjscore function it registers does not exist

settings/content.ini: it's empty

settings/image.ini: at least the todo comment says it's just for development, so double check this. at least remove "watermarks[]" so it does not clear settings from other extensions / siteacceses!

content/: empty