Merge ref 'db3e99bbab28' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: rust-lang/rust@db3e99b
Filtered ref: rust-lang/compiler-builtins@970db0b
Upstream diff: rust-lang/rust@44e34e1...db3e99b

This merge was created using https://github.com/rust-lang/josh-sync.

Author: The rustc-josh-sync Cronjob Bot

crates/core_arch/src/lib.rs

@@ -33,7 +33,6 @@
     f16,
     aarch64_unstable_target_feature,
     target_feature_inline_always,
-    bigint_helper_methods,
     funnel_shifts,
     avx10_target_feature,
     const_trait_impl,