--- a/devtools/shared/Parser.jsm
+++ b/devtools/shared/Parser.jsm
@@ -1129,17 +1129,16 @@ var SyntaxTreeVisitor = {
 
   /**
    * A try statement.
    *
    * interface TryStatement <: Statement {
    *   type: "TryStatement";
    *   block: BlockStatement;
    *   handler: CatchClause | null;
-   *   guardedHandlers: [ CatchClause ];
    *   finalizer: BlockStatement | null;
    * }
    */
   TryStatement(node, parent, callbacks) {
     node._parent = parent;
 
     if (this.break) {
       return;
@@ -1151,19 +1150,16 @@ var SyntaxTreeVisitor = {
     }
     if (callbacks.onTryStatement) {
       callbacks.onTryStatement(node);
     }
     this[node.block.type](node.block, node, callbacks);
     if (node.handler) {
       this[node.handler.type](node.handler, node, callbacks);
     }
-    for (let guardedHandler of node.guardedHandlers) {
-      this[guardedHandler.type](guardedHandler, node, callbacks);
-    }
     if (node.finalizer) {
       this[node.finalizer.type](node.finalizer, node, callbacks);
     }
   },
 
   /**
    * A while statement.
    *