Comment 10 for bug 1469204

Yeah, I agree and want to get there, but I figured just dropping it straight away would be doing our users a disservice (especially since it might not be obvious right away that it's not being used anymore).

For example, if a user has "--bip=..." set in DOCKER_OPTS in that file, then dropping the sourcing of it outright wouldn't cause the service to fail to start or anything, and it actually wouldn't change anything for the running system until the next reboot (at which time, Docker would revert back to choosing its own IP range, which will be a nasty surprise for said operator). :(