Auto merge of #90380 - Mark-Simulacrum:revert-89558-query-stable-lint, r=lcnr

Revert "Add rustc lint, warning when iterating over hashmaps"

Fixes perf regressions introduced in https://github.com/rust-lang/rust/pull/90235 by temporarily reverting the relevant PR.

compiler/rustc_trait_selection/src/lib.rs

@@ -22,7 +22,6 @@
 #![feature(crate_visibility_modifier)]
 #![feature(control_flow_enum)]
 #![recursion_limit = "512"] // For rustdoc
-#![cfg_attr(not(bootstrap), allow(rustc::potential_query_instability))]
 
 #[macro_use]
 extern crate rustc_macros;