Auto merge of #108095 - soc:drop-contains, r=Amanieu

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Drop unstable `Option::contains`, `Result::contains`, `Result::contains_err`

This is a proposal to drop the three functions `Option::contains`, `Result::contains` and `Result::contains_err`.

The discovery of `Option::is_some_with`/`Result::is_ok_with`/`Result::is_err_with` in https://github.com/rust-lang/rust/pull/93051 obviates the need for these methods (non-stabilization tracked in https://github.com/rust-lang/rust/issues/62358).

An additional benefit of change is that it avoids spurious error messages in IDEs, when `contains` is supplied by a third-party library:
![option-result-unstable](https://user-images.githubusercontent.com/42493/219127961-13cb559e-6ee8-4449-8dc9-d28d07270ad5.png)

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bors 2023-03-28 23:20:30 +00:00

parent d72a3f8eda b5ae8e79ae

commit 59b8c7cde2

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