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Rollup merge of #130370 - kpreid:patch-2, r=compiler-errors

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unstable-book: `trait_upcasting` example should not have `#![allow(incomplete_features)]`

Tracking issue: #65991

`trait_upcasting` is not currently an incomplete feature; therefore examples of its use do not require `#![allow(incomplete_features)]`.
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Stuart Cook 2024-09-15 12:14:58 +10:00 • committed by GitHub
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src/doc/unstable-book/src/language-features/trait-upcasting.md
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@ -12,7 +12,6 @@ so long as `Bar: Foo`.
```rust,edition2018
#![feature(trait_upcasting)]
#![allow(incomplete_features)]
trait Foo {}