[gvanrossum]

These will now all fail with unrecognized arguments: <flag>

--disallow-any (message points to options replacing it)
-f/--dirty-stubs (ignored)
--use-python-path (exited with error message)
-s/--silent-imports (set ignore_missing_imports=True and follow_imports=skip)
--almost-silent (ses follow_imports=error)
--[no-]fast-parser (ignored)
--strict-boolean (actually did something, though questionable)

I've put the removal of --strict-boolean in a separate commit since it's more controversial -- some people might still be using it, even though it's been deprecated since May 2017. See discussion in #3195.

[Michael0x2a]

Regarding the strict-boolean flag -- maybe one idea might be to move that sort of logic into a separate plugin that's independent from mypy.

I've been vaguely thinking about doing this myself, actually -- I can never remember what's supposed to be truthy or falsey from language to language, so most of my personal code is written in a style where this sort of plugin would actually be mildly useful/not very noisy. I'm not sure if our plugin system would support these kinds of extensions yet though.

[gvanrossum]

I don't think the plugin system could do that unless there was a way to request being called for every expression.

[emmatyping]

Hm, it seems I did the wrong thing trying to make flake8 happy. Sorry!

[gvanrossum]

No worries, I'll fix it.

[JukkaL]

Glad to see so many negative lines of code and removed options. I think that it's fine to remove these deprecated options now.