I assume at this point that at least a plurality of Go developers are using goimports and having this stuff handled automatically. That's probably another reason my opinion on this shifted.
If IDEs did the same for unused variables, I'd probably shift as well, but right now, commenting out a line quickly degenerates into a game of whack a mole, because it causes a previous calculation to become "unused", and commenting out that line causes two more things to become unused, etc. The last thing I want during debugging is to have to fight the compiler at every step.
