Update rasta outline expectations.

pkg/front_end/test/fasta/rasta/cascades.dart.outline.expect

Index: pkg/front_end/test/fasta/rasta/cascades.dart.outline.expect
diff --git a/pkg/front_end/test/fasta/rasta/cascades.dart.outline.expect b/pkg/front_end/test/fasta/rasta/cascades.dart.outline.expect
index ef94f0caf009524c4d7dfd8e1a83823343d4b0be..8c76e175b23745ead85a9053cba4fcf7cb8c0312 100644
--- a/pkg/front_end/test/fasta/rasta/cascades.dart.outline.expect
+++ b/pkg/front_end/test/fasta/rasta/cascades.dart.outline.expect
@@ -3,14 +3,10 @@ import self as self;
 import "dart:core" as core;
 
 class A extends core::Object {
-  constructor •() → self::A
-    : super core::Object::•();
+  constructor •() → void
+    ;
   method add(dynamic x) → dynamic
-    return x;
-}
-static method main() → dynamic {
-  dynamic a = new self::A::•();
-  function f(dynamic x) → dynamic
-    return x;
-  let final dynamic #t1 = a in let final dynamic #t2 = #t1.add(f).call("WHAT") in #t1;
+    ;
 }
+static method main() → dynamic
+  ;