Move kernel baseline tests to front_end.

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

Index: pkg/front_end/test/fasta/rasta/cascades.dart.dartk.expect
diff --git a/pkg/front_end/test/fasta/rasta/cascades.dart.dartk.expect b/pkg/front_end/test/fasta/rasta/cascades.dart.dartk.expect
deleted file mode 100644
index ef94f0caf009524c4d7dfd8e1a83823343d4b0be..0000000000000000000000000000000000000000
--- a/pkg/front_end/test/fasta/rasta/cascades.dart.dartk.expect
+++ /dev/null
@@ -1,16 +0,0 @@
-library;
-import self as self;
-import "dart:core" as core;
-
-class A extends core::Object {
-  constructor •() → self::A
-    : super core::Object::•();
-  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;
-}