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Rollup merge of #137922 - Zalathar:sharded, r=SparrowLii 

A few cleanups after the removal of `cfg(not(parallel))`

I noticed a few small things that are no longer needed after the removal of `cfg(not(parallel))` in #132282.

One of the later changes adjusts several imports, so viewing the changes individually is recommended.

r? SparrowLii (or reroll)
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Matthias Krüger 2025-03-03 20:47:15 +01:00 committed by GitHub
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src/parallel-rustc.md
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@ -46,10 +46,8 @@ are implemented differently depending on whether `parallel-compiler` is true.
| data structure | parallel | non-parallel |
| -------------------------------- | --------------------------------------------------- | ------------ |
| OnceCell | std::sync::OnceLock | std::cell::OnceCell |
| Lock\<T> | (parking_lot::Mutex\<T>) | (std::cell::RefCell) |
| RwLock\<T> | (parking_lot::RwLock\<T>) | (std::cell::RefCell) |
| MTRef<'a, T> | &'a T | &'a mut T |
| MTLock\<T> | (Lock\<T>) | (T) |
| ReadGuard | parking_lot::RwLockReadGuard | std::cell::Ref |
| MappedReadGuard | parking_lot::MappedRwLockReadGuard | std::cell::Ref |