Why remove-all-unused-imports isn't default behavior?

[xeon826]

I have this set in my pyproject.toml, and I see the doc states that there are cases that make this unsafe, can someone show me an example of code where this might break something?

[fsouza]

In Python, import a module executes code. If you have code that relies on import size effect, removing the import can break things.

Personally, I think that autoflake should still remove it, and users should use # noqa in cases like that, but I don't feel strongly enough about this to change the default. Changing defaults is always tricky.