Revert commit 88c7640ad16fa26f18c8988ff48323b99d4e25aa
Revert commit 88c7640ad16fa26f18c8988ff48323b99d4e25aa

This commit reverts 88c7640ad16fa26f18c8988ff48323b99d4e25aa from PR https://github.com/readthedocs/readthedocs.org/pull/6430/s

We found a problem with `from_url` that are smaller than 5 char
length. I'm reverting this here and adding a new commit that will
workaround this problem.

rtfd/readthedocs.org,rtfd/readthedocs.org,rtfd/readthedocs.org,rtfd/readthedocs.org