spotify/luigi — pull request #374 by Tarrasch (2014-07-07 13:05:50+00:00)
Title: Remove --lock warning when it's not passed

Previously you would *always* get the deprecation warning. Regardless if
it was passed.

Note however that it still can have an effect to pass the flag.
Unfortunately, the hash of the lock-file is based on even the
non-semantical flags like --lock (I want to kill myself).