remove x variable

[gdementen]

It has been deprecated for long enough and gives awfully annoying warning on each command when doing "from larray import *" in PyCharm's console.

[gdementen]

I opted to make it raise Exceptions instead of removing it directly, as it fixes the complaint that it caused warnings for each command in PyCharm console and will provide a nicer upgrade path for the remaining users if there are still any (we deprecated this 5 years ago)