cleanup patch generation to preseve comments and remove @patch

test/dart_codegen/expect/core/object.dart

Index: test/dart_codegen/expect/core/object.dart
diff --git a/test/dart_codegen/expect/core/object.dart b/test/dart_codegen/expect/core/object.dart
index 761720afb987d709fdb52e87099ffebf49407965..b34cda4d6917c55389473803bf9cd8f5a1868c28 100644
--- a/test/dart_codegen/expect/core/object.dart
+++ b/test/dart_codegen/expect/core/object.dart
@@ -3,17 +3,17 @@ part of dart.core;
 class Object {
   const Object();
   bool operator ==(other) => identical(this, other);
-  @patch int get hashCode => ((__x30) => DDC$RT.cast(__x30, dynamic, int,
-      "CastGeneral", """line 62, column 23 of dart:core/object.dart: """,
+  int get hashCode => ((__x30) => DDC$RT.cast(__x30, dynamic, int,
+      "CastGeneral", """line 73, column 23 of dart:core/object.dart: """,
       __x30 is int, true))(Primitives.objectHashCode(this));
-  @patch String toString() => ((__x31) => DDC$RT.cast(__x31, dynamic, String,
-      "CastGeneral", """line 65, column 24 of dart:core/object.dart: """,
+  String toString() => ((__x31) => DDC$RT.cast(__x31, dynamic, String,
+      "CastGeneral", """line 78, column 24 of dart:core/object.dart: """,
       __x31 is String, true))(Primitives.objectToString(this));
-  @patch dynamic noSuchMethod(Invocation invocation) {
+  dynamic noSuchMethod(Invocation invocation) {
     throw new NoSuchMethodError(this, invocation.memberName,
         invocation.positionalArguments, invocation.namedArguments);
   }
-  @patch Type get runtimeType => ((__x32) => DDC$RT.cast(__x32, dynamic, Type,
-      "CastGeneral", """line 77, column 27 of dart:core/object.dart: """,
+  Type get runtimeType => ((__x32) => DDC$RT.cast(__x32, dynamic, Type,
+      "CastGeneral", """line 101, column 27 of dart:core/object.dart: """,
       __x32 is Type, true))(getRuntimeType(this));
 }