Remove --benchmark / --statistics / --count ?

[asottile]

describe the request

did some quick profiling, flake8 -j1 spends about 5% of its time collecting these (even if they're not selected).

I also feel like these are not that useful and could probably be derived in a separate formatter if desired? I don't think I've ever used them but I've definitely broken them a few times.

what say to removing these options? (and perhaps providing a third party formatter for them as a middle-ground?)

this would also "trivially" solve #1458

[sigmavirus24]

Statistics is quite helpful when onboarding flake8 to a new project because you can get the count of problems and decide the low hanging fruit versus the more time-intensive problems that go into extend-ignore (assuming an auto-formatter doesn't catch the violations).

Perhaps if there was something that could suggest configuration based on existing violation frequency etc that would be more valuable

[asottile]

fwiw it seems --statistics can be gotten pretty easily with something like:

$ flake8 Lib/test/test_tools/ | awk '{print $2}' | sort | uniq -c | sort -rn
     30 E128
     10 E302
      4 F841
      3 E265
      3 E231
      2 E501
      2 E251
      2 E124
      1 F401
      1 E401
      1 E306
      1 E131

[sigmavirus24]

I think if we ship an extension to replace them that is probably acceptable. I suspect regardless of the number of jobs we're spending too much time on these for what is likely the benefit of very few users