remove unused variable

Author: jonboh

clippy_lints/src/unnecessary_map_on_constructor.rs

@@ -73,7 +73,7 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryMapOnConstructor {
             }
 
             if let Some(map_arg) = args.get(0)
-                && let hir::ExprKind::Path(fun) = map_arg.kind
+                && let hir::ExprKind::Path(_) = map_arg.kind
             {
                 if map_arg.span.from_expansion() {
                     return;