Remove extern crate rustc_macros from numerous crates.

compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs

@@ -1,4 +1,5 @@
 use rustc_infer::traits::{TraitEngine, TraitEngineExt};
+use rustc_macros::extension;
 
 use crate::infer::canonical::OriginalQueryValues;
 use crate::infer::InferCtxt;

compiler/rustc_trait_selection/src/traits/query/normalize.rs

@@ -13,6 +13,7 @@ use crate::traits::{ObligationCause, PredicateObligation, Reveal};
 use rustc_data_structures::sso::SsoHashMap;
 use rustc_data_structures::stack::ensure_sufficient_stack;
 use rustc_infer::traits::Normalized;
+use rustc_macros::extension;
 use rustc_middle::ty::fold::{FallibleTypeFolder, TypeFoldable, TypeSuperFoldable};
 use rustc_middle::ty::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitableExt};
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitor};

compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs

@@ -7,6 +7,7 @@ use rustc_infer::infer::canonical::Canonical;
 use rustc_infer::infer::outlives::components::{push_outlives_components, Component};
 use rustc_infer::infer::resolve::OpportunisticRegionResolver;
 use rustc_infer::traits::query::OutlivesBound;
+use rustc_macros::{HashStable, TypeFoldable, TypeVisitable};
 use rustc_middle::infer::canonical::CanonicalQueryResponse;
 use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::{self, ParamEnvAnd, Ty, TyCtxt, TypeFolder, TypeVisitableExt};

compiler/rustc_trait_selection/src/traits/query/type_op/outlives.rs

@@ -3,6 +3,7 @@ use crate::traits::query::dropck_outlives::{
     compute_dropck_outlives_inner, trivial_dropck_outlives,
 };
 use crate::traits::ObligationCtxt;
+use rustc_macros::{HashStable, TypeFoldable, TypeVisitable};
 use rustc_middle::traits::query::{DropckOutlivesResult, NoSolution};
 use rustc_middle::ty::{ParamEnvAnd, Ty, TyCtxt};