Auto merge of #10885 - max-niederman:redundant_local, r=Centri3

new lint: `redundant_locals`

This lint checks for code like the following:

```rs
let x = 1;
let x = x;
```

It checks (afaik) all cases where a binding is shadowed by its own value in the same block, including function parameters. This has no effect and is almost certainly accidental, so it's in the `correctness` category like `self_assignment`.

This also lays the groundwork for a more generalized version of #5102.

changelog: new lint: [`redundant_local`]

0 files changed, 0 insertions, 0 deletions