Validators package cannot be installed with newest pip

[dpriskorn]

We should remove it and replace the url validation with the following:

from urllib.parse import urlparse

def is_url(url):
  try:
    result = urlparse(url)
    return all([result.scheme, result.netloc])
  except ValueError:
    return False

[dpriskorn]

on a second run it succeded. huh