simplify borrowing

Author: syvb

compiler/rustc_mir_build/src/thir/visit.rs

@@ -146,19 +146,19 @@ pub fn walk_expr<'a, 'tcx: 'a, V: Visitor<'a, 'tcx>>(visitor: &mut V, expr: &Exp
 }
 
 pub fn walk_stmt<'a, 'tcx: 'a, V: Visitor<'a, 'tcx>>(visitor: &mut V, stmt: &Stmt<'tcx>) {
-    match &stmt.kind {
-        StmtKind::Expr { expr, scope: _ } => visitor.visit_expr(&visitor.thir()[*expr]),
+    match stmt.kind {
+        StmtKind::Expr { expr, scope: _ } => visitor.visit_expr(&visitor.thir()[expr]),
         StmtKind::Let {
             initializer,
             remainder_scope: _,
             init_scope: _,
-            pattern,
+            ref pattern,
             lint_level: _,
         } => {
             if let Some(init) = initializer {
-                visitor.visit_expr(&visitor.thir()[*init]);
+                visitor.visit_expr(&visitor.thir()[init]);
             }
-            visitor.visit_pat(&pattern);
+            visitor.visit_pat(pattern);
         }
     }
 }