Remove `extern crate rustc_middle` from `rustc_ty_utils`.
diff --git a/compiler/rustc_ty_utils/src/abi.rs b/compiler/rustc_ty_utils/src/abi.rs
index c6b8362..fd7e2fe 100644
--- a/compiler/rustc_ty_utils/src/abi.rs
+++ b/compiler/rustc_ty_utils/src/abi.rs
@@ -1,5 +1,6 @@
use rustc_hir as hir;
use rustc_hir::lang_items::LangItem;
+use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::layout::{
fn_can_unwind, FnAbiError, HasParamEnv, HasTyCtxt, LayoutCx, LayoutOf, TyAndLayout,
diff --git a/compiler/rustc_ty_utils/src/assoc.rs b/compiler/rustc_ty_utils/src/assoc.rs
index d3fe829..4395eb5 100644
--- a/compiler/rustc_ty_utils/src/assoc.rs
+++ b/compiler/rustc_ty_utils/src/assoc.rs
@@ -5,6 +5,7 @@
use rustc_hir::intravisit::{self, Visitor};
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, ImplTraitInTraitData, TyCtxt};
+use rustc_middle::{bug, span_bug};
use rustc_span::symbol::kw;
pub(crate) fn provide(providers: &mut Providers) {
diff --git a/compiler/rustc_ty_utils/src/consts.rs b/compiler/rustc_ty_utils/src/consts.rs
index acbcc39..fec02f5 100644
--- a/compiler/rustc_ty_utils/src/consts.rs
+++ b/compiler/rustc_ty_utils/src/consts.rs
@@ -1,6 +1,7 @@
use rustc_errors::ErrorGuaranteed;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::LocalDefId;
+use rustc_middle::bug;
use rustc_middle::mir::interpret::{LitToConstError, LitToConstInput};
use rustc_middle::query::Providers;
use rustc_middle::thir::visit;
diff --git a/compiler/rustc_ty_utils/src/implied_bounds.rs b/compiler/rustc_ty_utils/src/implied_bounds.rs
index 862fb2e..e87058f 100644
--- a/compiler/rustc_ty_utils/src/implied_bounds.rs
+++ b/compiler/rustc_ty_utils/src/implied_bounds.rs
@@ -2,6 +2,7 @@
use rustc_hir as hir;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::LocalDefId;
+use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_span::Span;
diff --git a/compiler/rustc_ty_utils/src/instance.rs b/compiler/rustc_ty_utils/src/instance.rs
index d0aa4eb..41f482d 100644
--- a/compiler/rustc_ty_utils/src/instance.rs
+++ b/compiler/rustc_ty_utils/src/instance.rs
@@ -1,6 +1,7 @@
use rustc_errors::ErrorGuaranteed;
use rustc_hir::def_id::DefId;
use rustc_infer::infer::TyCtxtInferExt;
+use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::traits::{BuiltinImplSource, CodegenObligationError};
use rustc_middle::ty::GenericArgsRef;
diff --git a/compiler/rustc_ty_utils/src/layout.rs b/compiler/rustc_ty_utils/src/layout.rs
index f78a28d..1ef2249 100644
--- a/compiler/rustc_ty_utils/src/layout.rs
+++ b/compiler/rustc_ty_utils/src/layout.rs
@@ -2,6 +2,7 @@
use rustc_hir as hir;
use rustc_index::bit_set::BitSet;
use rustc_index::{IndexSlice, IndexVec};
+use rustc_middle::bug;
use rustc_middle::mir::{CoroutineLayout, CoroutineSavedLocal};
use rustc_middle::query::Providers;
use rustc_middle::ty::layout::{
diff --git a/compiler/rustc_ty_utils/src/layout_sanity_check.rs b/compiler/rustc_ty_utils/src/layout_sanity_check.rs
index 6332c61..ab7d1be 100644
--- a/compiler/rustc_ty_utils/src/layout_sanity_check.rs
+++ b/compiler/rustc_ty_utils/src/layout_sanity_check.rs
@@ -1,3 +1,4 @@
+use rustc_middle::bug;
use rustc_middle::ty::{
layout::{LayoutCx, TyAndLayout},
TyCtxt,
diff --git a/compiler/rustc_ty_utils/src/lib.rs b/compiler/rustc_ty_utils/src/lib.rs
index fd392d1..e8c5c54 100644
--- a/compiler/rustc_ty_utils/src/lib.rs
+++ b/compiler/rustc_ty_utils/src/lib.rs
@@ -17,8 +17,6 @@
#![feature(never_type)]
#[macro_use]
-extern crate rustc_middle;
-#[macro_use]
extern crate tracing;
use rustc_middle::query::Providers;
diff --git a/compiler/rustc_ty_utils/src/needs_drop.rs b/compiler/rustc_ty_utils/src/needs_drop.rs
index ee930a7..4e23fb3 100644
--- a/compiler/rustc_ty_utils/src/needs_drop.rs
+++ b/compiler/rustc_ty_utils/src/needs_drop.rs
@@ -2,6 +2,7 @@
use rustc_data_structures::fx::FxHashSet;
use rustc_hir::def_id::DefId;
+use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::util::{needs_drop_components, AlwaysRequiresDrop};
use rustc_middle::ty::GenericArgsRef;
diff --git a/compiler/rustc_ty_utils/src/opaque_types.rs b/compiler/rustc_ty_utils/src/opaque_types.rs
index d7d31a8..be227ec 100644
--- a/compiler/rustc_ty_utils/src/opaque_types.rs
+++ b/compiler/rustc_ty_utils/src/opaque_types.rs
@@ -2,6 +2,7 @@
use rustc_hir::intravisit::Visitor;
use rustc_hir::{def::DefKind, def_id::LocalDefId};
use rustc_hir::{intravisit, CRATE_HIR_ID};
+use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::util::{CheckRegions, NotUniqueParam};
use rustc_middle::ty::{self, Ty, TyCtxt};
diff --git a/compiler/rustc_ty_utils/src/representability.rs b/compiler/rustc_ty_utils/src/representability.rs
index 446f16b..0ffb7f6 100644
--- a/compiler/rustc_ty_utils/src/representability.rs
+++ b/compiler/rustc_ty_utils/src/representability.rs
@@ -1,5 +1,6 @@
use rustc_hir::def::DefKind;
use rustc_index::bit_set::BitSet;
+use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, Representability, Ty, TyCtxt};
use rustc_span::def_id::LocalDefId;
diff --git a/compiler/rustc_ty_utils/src/sig_types.rs b/compiler/rustc_ty_utils/src/sig_types.rs
index 19c092c..2d8c782 100644
--- a/compiler/rustc_ty_utils/src/sig_types.rs
+++ b/compiler/rustc_ty_utils/src/sig_types.rs
@@ -4,6 +4,7 @@
use rustc_ast_ir::try_visit;
use rustc_ast_ir::visit::VisitorResult;
use rustc_hir::{def::DefKind, def_id::LocalDefId};
+use rustc_middle::span_bug;
use rustc_middle::ty::{self, TyCtxt};
use rustc_span::Span;
use rustc_type_ir::visit::TypeVisitable;
diff --git a/compiler/rustc_ty_utils/src/ty.rs b/compiler/rustc_ty_utils/src/ty.rs
index fa1085c..d98b46d 100644
--- a/compiler/rustc_ty_utils/src/ty.rs
+++ b/compiler/rustc_ty_utils/src/ty.rs
@@ -3,6 +3,7 @@
use rustc_hir::def::DefKind;
use rustc_hir::LangItem;
use rustc_index::bit_set::BitSet;
+use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, EarlyBinder, Ty, TyCtxt, TypeVisitableExt, TypeVisitor};
use rustc_middle::ty::{ToPredicate, TypeSuperVisitable, TypeVisitable};
