Don't use logger before it is configured
Don't use logger before it is configured

This patch removes the first call to check_provider. Because logging
is not configured when the file is imported, any calls to logger.error
result only this unhelpful error message being shown:

  No handlers could be found for logger "stacktrain.config.general"

The check_provider call in st.py is the only one we need.

backport: rocky queens

Closes-Bug: #1803341

Change-Id: Ie75ca928b13a51433f8d61500407049a0e636d45

openstack/training-labs,openstack/training-labs,openstack/training-labs