Remove auto traits from ICE work-around

runtime/src/builtins.rs

@@ -91,24 +91,6 @@ impl AutoTraitBreakSendSync for InnerBuiltinFeatureTransition {}
 #[derive(AbiExample, Clone, Debug)]
 pub struct BuiltinFeatureTransition(InnerBuiltinFeatureTransition);
 
-// https://github.com/solana-labs/solana/pull/23233 added `BuiltinFeatureTransition`
-// to `Bank` which triggers https://github.com/rust-lang/rust/issues/92987 while
-// attempting to resolve `Sync` on `BankRc` in `AccountsBackgroundService::new` ala,
-//
-// query stack during panic:
-// #0 [evaluate_obligation] evaluating trait selection obligation `bank::BankRc: core::marker::Sync`
-// #1 [typeck] type-checking `accounts_background_service::<impl at runtime/src/accounts_background_service.rs:358:1: 520:2>::new`
-// #2 [typeck_item_bodies] type-checking all item bodies
-// #3 [analysis] running analysis passes on this crate
-// end of query stack
-//
-// Yoloing a `Sync` onto it avoids the auto trait evaluation and thus the ICE.
-//
-// We should remove this when upgrading to Rust 1.60.0, where the bug has been
-// fixed by https://github.com/rust-lang/rust/pull/93064
-unsafe impl Send for BuiltinFeatureTransition {}
-unsafe impl Sync for BuiltinFeatureTransition {}
-
 impl BuiltinFeatureTransition {
     pub fn to_action(
         &self,