We're trying to track down deprecated OSG environment variables https://jira.opensciencegrid.org/browse/SOFTWARE-3011). The following don't appear to be used by any pilots:

• OSG_DATA
• OSG_DEFAULT_SE
• OSG_GLEXEC_LOCATION
• OSG_HOSTNAME
• OSG_LOCATION
• OSG_STORAGE_ELEMENT

So we would like to remove them in OSG 3.4 or at the very least, announce their deprecation.