fix clippy

Author: Jamesbarford

src/tools/clippy/clippy_lints/src/eta_reduction.rs

@@ -11,6 +11,7 @@ use rustc_infer::infer::TyCtxtInferExt;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::adjustment::{Adjust, DerefAdjustKind};
 use rustc_middle::ty::{
+    RegionUtilitiesExt,
     self, Binder, ClosureKind, FnSig, GenericArg, GenericArgKind, List, Region, Ty, TypeVisitableExt, TypeckResults,
 };
 use rustc_session::declare_lint_pass;

src/tools/clippy/clippy_lints/src/operators/identity_op.rs

@@ -7,6 +7,7 @@ use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{BinOpKind, Expr, ExprKind, Node, Path, QPath};
 use rustc_lint::LateContext;
 use rustc_middle::ty;
+use rustc_middle::ty::RegionUtilitiesExt;
 use rustc_span::{Span, SyntaxContext, kw};
 
 use super::IDENTITY_OP;

src/tools/clippy/clippy_lints/src/returns/let_and_return.rs

@@ -8,7 +8,7 @@ use core::ops::ControlFlow;
 use rustc_errors::Applicability;
 use rustc_hir::{Block, Expr, PatKind, StmtKind};
 use rustc_lint::{LateContext, LintContext};
-use rustc_middle::ty::GenericArgKind;
+use rustc_middle::ty::{GenericArgKind, RegionUtilitiesExt};
 use rustc_span::edition::Edition;
 
 use super::LET_AND_RETURN;