dart2js cps: Remove default call to visit return continuation.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
index 49c8a6b1117ba98f416c521d72fc2407718a4fa5..1f85d501be295579aa946beac49033195719e4b5 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
@@ -2016,7 +2016,6 @@ class DeepRecursiveVisitor implements Visitor {
     processFunctionDefinition(node);
     if (node.thisParameter != null) visit(node.thisParameter);
     node.parameters.forEach(visit);
-    visit(node.returnContinuation);
     visit(node.body);
   }
 
@@ -2377,7 +2376,6 @@ class TrampolineRecursiveVisitor extends DeepRecursiveVisitor {
     processFunctionDefinition(node);
     if (node.thisParameter != null) visit(node.thisParameter);
     node.parameters.forEach(visit);
-    visit(node.returnContinuation);
     visit(node.body);
   }