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

third_party/pkg/angular/lib/utils.dart

Index: third_party/pkg/angular/lib/utils.dart
diff --git a/third_party/pkg/angular/lib/utils.dart b/third_party/pkg/angular/lib/utils.dart
index 85762086bc925276d2d7b4a1b844382f83ea6ec4..1a476b7373de2f804f18484809942ceb77fde4a4 100644
--- a/third_party/pkg/angular/lib/utils.dart
+++ b/third_party/pkg/angular/lib/utils.dart
@@ -118,10 +118,3 @@ final Set<String> RESERVED_WORDS = new Set<String>.from(const [
   "while",
   "with"
 ]);
-
-/// Returns true iff o is [double.NAN].
-/// In particular, returns false if o is null.
-bool isNaN(Object o) => o is num && o.isNaN;
-
-/// Returns true iff o1 == o2 or both are [double.NAN].
-bool eqOrNaN(Object o1, Object o2) => o1 == o2 || (isNaN(o1) && isNaN(o2));