Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/duplicated_mixin.dart.direct.expect

Index: pkg/front_end/test/fasta/rasta/duplicated_mixin.dart.direct.expect
diff --git a/pkg/front_end/test/fasta/rasta/duplicated_mixin.dart.direct.expect b/pkg/front_end/test/fasta/rasta/duplicated_mixin.dart.direct.expect
deleted file mode 100644
index 871625f5a406755ed5c4aa875ad80ab406f03082..0000000000000000000000000000000000000000
--- a/pkg/front_end/test/fasta/rasta/duplicated_mixin.dart.direct.expect
+++ /dev/null
@@ -1,27 +0,0 @@
-library;
-import self as self;
-import "dart:core" as core;
-
-class Mixin extends core::Object {
-  field dynamic field = null;
-  constructor •() → void
-    : super core::Object::•()
-    ;
-}
-class A extends self::Object&Mixin&Mixin {
-  constructor •() → void
-    : super self::Object&Mixin&Mixin::•()
-    ;
-}
-abstract class Object&Mixin extends core::Object implements self::Mixin {
-  field dynamic field = null;
-  constructor •() → void
-    : super core::Object::•()
-    ;
-}
-abstract class Object&Mixin&Mixin extends self::Object&Mixin implements self::Mixin {
-  field dynamic field = null;
-  constructor •() → void
-    : super self::Object&Mixin::•()
-    ;
-}