dandds a10d733fb7 Fix test and LGTM warnings.
- Fixes LGTM warnings for an unused import and equality comparisons to
  None in SQLAlchemy filters.
- Removes part of a unit test asserting that the claimed_until locking
  mechanism works correctly. If I recall correctly, this does not work
  in unit tests because the test takes place inside a transaction, and
  the database provider does evaluate the current time until the
  transaction is written.
2020-01-27 06:27:18 -05:00
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2020-01-27 06:27:18 -05:00
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