With Sphinx 3.0.0 released yesterday, docs build started to fail:
Extension error:
Could not import extension wsmeext.sphinxext (exception: cannot import name 'l_' from 'sphinx.locale'
We only use wsme in the deprecated Blazar v2 API which we intend to
remove. Remove its documentation and the Sphinx extension from the
configuration first in order to fix the gate.
Change-Id: Ia740b98016c3384b37d55aff6e54ed640332fa01