Rollup merge of rust-lang#86807 - tversteeg:patch-1, r=bjorn3

Fix double import in wasm thread

The `unsupported` type is imported two times, as `super::unsupported` and as `crate::sys::unsupported`, throwing an error. Remove `super::unsupported` in favor of the other.

As reported in rust-lang#86802.

Fix rust-lang#86802

Author: JohnTitor

std/src/sys/wasm/atomics/thread.rs

@@ -1,4 +1,3 @@
-use super::unsupported;
 use crate::ffi::CStr;
 use crate::io;
 use crate::num::NonZeroUsize;