switch from pylint to pyflakes

Pylint has given us far far more false positives than have been useful, to the point where I feel pylint is starting to be more of a problem than a help.

Lets disable it and/or switch to pyflakes.
is this related to the removal of pylint? is it something pylint didn't spot as unneeded, but pyflakes did, so to enable pyflakes you also had to remove these unneeded imports?