Try to remove the images folder again with rmdir . Make sure it’s the one in the website folder.
cd website
rmdir images
ls
and i the file is deleted and still cant finish i dont know why?
try to exit the terminal then reset the current step
then open a new terminal to see if you can get it to recognize your actions
Hello! 
I have the same problem with this task. I tried to do as you wrote. Did not help.
What to do?
can you open a new topic for yourself with a screenshot showing what you are trying and the step etc?