modify code

[rust.git] / clippy_lints / src / fallible_impl_from.rs

diff --git a/clippy_lints/src/fallible_impl_from.rs b/clippy_lints/src/fallible_impl_from.rs
index 02f1baf27fae81cc184cf64a5fdfe723d70c84cc..574678b5542111d4c3132b825139c56356254e25 100644 (file)
--- a/clippy_lints/src/fallible_impl_from.rs
+++ b/clippy_lints/src/fallible_impl_from.rs
@@ -5,7 +5,6 @@
 use if_chain::if_chain;
 use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass};
-use rustc_middle::hir::map::Map;
 use rustc_middle::ty;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::{sym, Span};
@@ -68,7 +67,7 @@ fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
 }
 
 fn lint_impl_body<'tcx>(cx: &LateContext<'tcx>, impl_span: Span, impl_items: &[hir::ImplItemRef]) {
-    use rustc_hir::intravisit::{self, NestedVisitorMap, Visitor};
+    use rustc_hir::intravisit::{self, Visitor};
     use rustc_hir::{Expr, ImplItemKind};
 
     struct FindPanicUnwrap<'a, 'tcx> {
@@ -78,8 +77,6 @@ struct FindPanicUnwrap<'a, 'tcx> {
     }
 
     impl<'a, 'tcx> Visitor<'tcx> for FindPanicUnwrap<'a, 'tcx> {
-        type Map = Map<'tcx>;
-
         fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
             if let Some(macro_call) = root_macro_call_first_node(self.lcx, expr) {
                 if is_panic(self.lcx, macro_call.def_id) {
@@ -100,10 +97,6 @@ fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
             // and check sub-expressions
             intravisit::walk_expr(self, expr);
         }
-
-        fn nested_visit_map(&mut self) -> NestedVisitorMap<Self::Map> {
-            NestedVisitorMap::None
-        }
     }
 
     for impl_item in impl_items {