Removal mutators

[magwas]

Is your feature request related to a problem? Please describe.

I want to be able to detect everything for which a unit test is not written. The easiest case of it is to remove code like method calls and see whether it breaks tests.

Describe the solution you'd like

I would like to see removal mutators implemented (like those in c#). Most importantly removal of function calls.

Describe alternatives you've considered I cannot see other way to achieve the goal, and don't have the expertise to suggest implementation alternatives.

Additional context

After reporting #3912 I removed the erring test. To my concern, the tested code came out as 100% mutation coverage, and even one of the remaining two tests was marked as not killing.

[stale[bot]]

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