Removing section from tox that is YAML formatted.
Removing section from tox that is YAML formatted.

It seems to be a remnant of come copy-pasta in
.travis.yml.

googleapis/oauth2client,clancychilds/oauth2client,clancychilds/oauth2client,googleapis/oauth2client,google/oauth2client,jonparrott/oauth2client,google/oauth2client,jonparrott/oauth2client