boto/boto — pull request #1198 by abhinav-upadhyay (2012-12-23 21:15:29+00:00)
Title: Removal of some unused imports and some minor fixes.

Apart from the large number of unused imports, the pull request also addresses two small errors I noticed in the code:

1. At one place, the pass statement was not properly indented.
2. Also, boto/emr/step.py had a bunch of methods trying to raise NotImplemented, which I believe, should have been raise NotImplementedError().