Remove unused imports from python files
Review Request #2295 - Created May 31, 2015 and submitted
|dturner-tw, jsirois, zundel|
This was done by running Intellij's Optimize Imports tool over the python files. I then checked the BUILD files against the diff manually. I reverted a couple of style conflicts with isort (intellij moves 'import sys' to its own section) but other than that this was easy and took 15-20 mins. The only tedious part was that many BUILD files use "dependency bags" which meant I often had to grep the entire module to see if a dep could be removed from the bag or not.
Pull request in the Bugs field.