Remove cruft from configure-aspen.py
Remove cruft from configure-aspen.py

These were used for their oauth_url methods, which will now be on
the platform objects in the platform registry on website.

eXcomm/gratipay.com,eXcomm/gratipay.com,eXcomm/gratipay.com,gratipay/gratipay.com,gratipay/gratipay.com,mccolgst/www.gittip.com,gratipay/gratipay.com,mccolgst/www.gittip.com,studio666/gratipay.com,eXcomm/gratipay.com,gratipay/gratipay.com,mccolgst/www.gittip.com,mccolgst/www.gittip.com,studio666/gratipay.com,studio666/gratipay.com,studio666/gratipay.com