Revert "Update all Angular libs (run update_all.sh)."

third_party/pkg/angular/lib/formatter/stringify.dart

Index: third_party/pkg/angular/lib/formatter/stringify.dart
diff --git a/third_party/pkg/angular/lib/formatter/stringify.dart b/third_party/pkg/angular/lib/formatter/stringify.dart
deleted file mode 100644
index 439bfc64583a79f470a9ce178767cb5b433fc6cd..0000000000000000000000000000000000000000
--- a/third_party/pkg/angular/lib/formatter/stringify.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-part of angular.formatter_internal;
-
-/**
- * Allows you to convert an object to a string.
- *
- * Null object are converted to an empty string.
- *
- *
- * Usage:
- *
- *     {{ expression | stringify }}
- */
-@Formatter(name:'stringify')
-class Stringify implements Function {
-  String call(obj) => obj == null ? "" : obj.toString();
-}