Remove Duolingo cartoons

Automatically remove cartoons displayed in skills and lessons on Duolingo before they are loaded. Developed with all languages in mind, but tested in German. Works on both exercises and skills. Does not interfere with stories. No effect on performance as it only uses CSS. Works with all devices.

If the extension is not working/their cartoon images are loading as well, please refresh the page you are on before reporting a bug to WenLiProgramming [at] gmail.com