Remove `extern crate rustc_session` from `rustc_lint`.

compiler/rustc_lint/src/array_into_iter.rs

@@ -6,6 +6,7 @@ use rustc_hir as hir;
 use rustc_middle::ty;
 use rustc_middle::ty::adjustment::{Adjust, Adjustment};
 use rustc_session::lint::FutureIncompatibilityReason;
+use rustc_session::{declare_lint, impl_lint_pass};
 use rustc_span::edition::Edition;
 use rustc_span::symbol::sym;
 use rustc_span::Span;

compiler/rustc_lint/src/async_fn_in_trait.rs

@@ -2,6 +2,7 @@ use crate::lints::AsyncFnInTraitDiag;
 use crate::LateContext;
 use crate::LateLintPass;
 use rustc_hir as hir;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_trait_selection::traits::error_reporting::suggestions::suggest_desugaring_async_fn_to_impl_future_in_trait;
 
 declare_lint! {

compiler/rustc_lint/src/builtin.rs

@@ -59,6 +59,7 @@ use rustc_middle::ty::ToPredicate;
 use rustc_middle::ty::TypeVisitableExt;
 use rustc_middle::ty::{self, Ty, TyCtxt, VariantDef};
 use rustc_session::lint::{BuiltinLintDiag, FutureIncompatibilityReason};
+use rustc_session::{declare_lint, declare_lint_pass, impl_lint_pass};
 use rustc_span::edition::Edition;
 use rustc_span::source_map::Spanned;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};

compiler/rustc_lint/src/deref_into_dyn_supertrait.rs

@@ -6,6 +6,7 @@ use crate::{
 use rustc_hir as hir;
 use rustc_middle::ty;
 use rustc_session::lint::FutureIncompatibilityReason;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::sym;
 use rustc_trait_selection::traits::supertraits;
 

compiler/rustc_lint/src/drop_forget_useless.rs

@@ -1,5 +1,6 @@
 use rustc_hir::{Arm, Expr, ExprKind, Node};
 use rustc_middle::ty;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::sym;
 
 use crate::{

compiler/rustc_lint/src/enum_intrinsics_non_enums.rs

@@ -5,6 +5,7 @@ use crate::{
 };
 use rustc_hir as hir;
 use rustc_middle::ty::{visit::TypeVisitableExt, Ty};
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::{symbol::sym, Span};
 
 declare_lint! {

compiler/rustc_lint/src/for_loops_over_fallibles.rs

@@ -10,6 +10,7 @@ use hir::{Expr, Pat};
 use rustc_hir as hir;
 use rustc_infer::{infer::TyCtxtInferExt, traits::ObligationCause};
 use rustc_middle::ty::{self, List};
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::{sym, Span};
 use rustc_trait_selection::traits::ObligationCtxt;
 

compiler/rustc_lint/src/foreign_modules.rs

@@ -5,6 +5,7 @@ use rustc_hir::def::DefKind;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::layout::LayoutError;
 use rustc_middle::ty::{self, Instance, Ty, TyCtxt};
+use rustc_session::declare_lint;
 use rustc_span::{sym, Span, Symbol};
 use rustc_target::abi::FIRST_VARIANT;
 

compiler/rustc_lint/src/hidden_unicode_codepoints.rs

@@ -7,6 +7,7 @@ use crate::{
 };
 use ast::util::unicode::{contains_text_flow_control_chars, TEXT_FLOW_CONTROL_CHARS};
 use rustc_ast as ast;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::{BytePos, Span, Symbol};
 
 declare_lint! {

compiler/rustc_lint/src/invalid_from_utf8.rs

@@ -2,6 +2,7 @@ use std::str::Utf8Error;
 
 use rustc_ast::LitKind;
 use rustc_hir::{Expr, ExprKind};
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::source_map::Spanned;
 use rustc_span::sym;
 

compiler/rustc_lint/src/let_underscore.rs

@@ -5,6 +5,7 @@ use crate::{
 use rustc_errors::MultiSpan;
 use rustc_hir as hir;
 use rustc_middle::ty;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::{sym, Symbol};
 
 declare_lint! {

compiler/rustc_lint/src/lib.rs

@@ -42,8 +42,6 @@
 #[macro_use]
 extern crate rustc_middle;
 #[macro_use]
-extern crate rustc_session;
-#[macro_use]
 extern crate tracing;
 
 mod array_into_iter;

compiler/rustc_lint/src/map_unit_fn.rs

@@ -6,6 +6,7 @@ use rustc_middle::{
     query::Key,
     ty::{self, Ty},
 };
+use rustc_session::{declare_lint, declare_lint_pass};
 
 declare_lint! {
     /// The `map_unit_fn` lint checks for `Iterator::map` receive

compiler/rustc_lint/src/methods.rs

@@ -4,6 +4,7 @@ use crate::LateLintPass;
 use crate::LintContext;
 use rustc_hir::{Expr, ExprKind};
 use rustc_middle::ty;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::{symbol::sym, Span};
 
 declare_lint! {

compiler/rustc_lint/src/multiple_supertrait_upcastable.rs

@@ -1,6 +1,7 @@
 use crate::{LateContext, LateLintPass, LintContext};
 
 use rustc_hir as hir;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::sym;
 
 declare_lint! {

compiler/rustc_lint/src/non_ascii_idents.rs

@@ -6,6 +6,7 @@ use crate::{EarlyContext, EarlyLintPass, LintContext};
 use rustc_ast as ast;
 use rustc_data_structures::fx::FxIndexMap;
 use rustc_data_structures::unord::UnordMap;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::symbol::Symbol;
 use unicode_security::general_security_profile::IdentifierType;
 

compiler/rustc_lint/src/non_fmt_panic.rs

@@ -8,6 +8,7 @@ use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty;
 use rustc_parse_format::{ParseMode, Parser, Piece};
 use rustc_session::lint::FutureIncompatibilityReason;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::edition::Edition;
 use rustc_span::{hygiene, sym, symbol::kw, InnerSpan, Span, Symbol};
 use rustc_trait_selection::infer::InferCtxtExt;

compiler/rustc_lint/src/non_local_def.rs

@@ -5,6 +5,7 @@ use rustc_infer::infer::InferCtxt;
 use rustc_infer::traits::{Obligation, ObligationCause};
 use rustc_middle::ty::{self, Binder, Ty, TyCtxt, TypeFoldable, TypeFolder};
 use rustc_middle::ty::{EarlyBinder, TraitRef, TypeSuperFoldable};
+use rustc_session::{declare_lint, impl_lint_pass};
 use rustc_span::def_id::{DefId, LOCAL_CRATE};
 use rustc_span::Span;
 use rustc_span::{sym, symbol::kw, ExpnKind, MacroKind};

compiler/rustc_lint/src/nonstandard_style.rs

@@ -11,6 +11,7 @@ use rustc_hir::intravisit::FnKind;
 use rustc_hir::{GenericParamKind, PatKind};
 use rustc_middle::ty;
 use rustc_session::config::CrateType;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::def_id::LocalDefId;
 use rustc_span::symbol::{sym, Ident};
 use rustc_span::{BytePos, Span};

compiler/rustc_lint/src/noop_method_call.rs

@@ -8,6 +8,7 @@ use rustc_hir::def::DefKind;
 use rustc_hir::{Expr, ExprKind};
 use rustc_middle::ty;
 use rustc_middle::ty::adjustment::Adjust;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::symbol::sym;
 
 declare_lint! {

compiler/rustc_lint/src/opaque_hidden_inferred_bound.rs

@@ -4,6 +4,7 @@ use rustc_macros::{LintDiagnostic, Subdiagnostic};
 use rustc_middle::ty::{
     self, fold::BottomUpFolder, print::TraitPredPrintModifiersAndPath, Ty, TypeFoldable,
 };
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::{symbol::kw, Span};
 use rustc_trait_selection::traits;
 use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt;

compiler/rustc_lint/src/pass_by_value.rs

@@ -4,6 +4,7 @@ use rustc_hir as hir;
 use rustc_hir::def::Res;
 use rustc_hir::{GenericArg, PathSegment, QPath, TyKind};
 use rustc_middle::ty;
+use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::symbol::sym;
 
 declare_tool_lint! {

compiler/rustc_lint/src/redundant_semicolon.rs

@@ -1,5 +1,6 @@
 use crate::{lints::RedundantSemicolonsDiag, EarlyContext, EarlyLintPass, LintContext};
 use rustc_ast::{Block, StmtKind};
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::Span;
 
 declare_lint! {

compiler/rustc_lint/src/reference_casting.rs

@@ -2,6 +2,7 @@ use rustc_ast::Mutability;
 use rustc_hir::{Expr, ExprKind, UnOp};
 use rustc_middle::ty::layout::LayoutOf as _;
 use rustc_middle::ty::{self, layout::TyAndLayout};
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::sym;
 
 use crate::{lints::InvalidReferenceCastingDiag, LateContext, LateLintPass, LintContext};

compiler/rustc_lint/src/traits.rs

@@ -3,6 +3,7 @@ use crate::LateContext;
 use crate::LateLintPass;
 use crate::LintContext;
 use rustc_hir as hir;
+use rustc_session::{declare_lint, declare_lint_pass};
 use rustc_span::symbol::sym;
 
 declare_lint! {

compiler/rustc_lint/src/types.rs

@@ -22,6 +22,7 @@ use rustc_middle::ty::GenericArgsRef;
 use rustc_middle::ty::{
     self, AdtKind, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt,
 };
+use rustc_session::{declare_lint, declare_lint_pass, impl_lint_pass};
 use rustc_span::def_id::LocalDefId;
 use rustc_span::source_map;
 use rustc_span::symbol::sym;

compiler/rustc_lint/src/unit_bindings.rs

@@ -2,6 +2,7 @@ use crate::lints::UnitBindingsDiag;
 use crate::{LateLintPass, LintContext};
 use rustc_hir as hir;
 use rustc_middle::ty::Ty;
+use rustc_session::{declare_lint, declare_lint_pass};
 
 declare_lint! {
     /// The `unit_bindings` lint detects cases where bindings are useless because they have

compiler/rustc_lint/src/unused.rs

@@ -16,6 +16,7 @@ use rustc_hir::def_id::DefId;
 use rustc_infer::traits::util::elaborate;
 use rustc_middle::ty::adjustment;
 use rustc_middle::ty::{self, Ty};
+use rustc_session::{declare_lint, declare_lint_pass, impl_lint_pass};
 use rustc_span::symbol::Symbol;
 use rustc_span::symbol::{kw, sym};
 use rustc_span::{BytePos, Span};