Remove unused reference from config-generator
Remove unused reference from config-generator

When operating `tox -e genconfig`, the tox did output the following
warning message:

  WARNING:stevedore.named:Could not load oslo.utils

because the oslo module doesn't have any config options.
This patch removes this invalid reference from config-generator.

Change-Id: I523c915c14cf00916224d5ce69f7c659e397dc7d

ChameleonCloud/blazar,ChameleonCloud/blazar,stackforge/blazar,stackforge/blazar,openstack/blazar,openstack/blazar