Revert "Add @deprecated and @override to core."

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 1821db949af2208377e4ca3ace2d111631a85a1f..5bbc28b7b4868df6813dddab321a72629d28b600 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -7174,14 +7174,11 @@ abstract class Element extends Node implements ElementTraversal native "*Element
   /**
    * Deprecated, use innerHtml instead.
    */
-  @deprecated
   String get innerHTML => this.innerHtml;
-  @deprecated
   void set innerHTML(String value) {
     this.innerHtml = value;
   }
 
-  @deprecated
   void set elements(Collection<Element> value) {
     this.children = value;
   }
@@ -7189,7 +7186,6 @@ abstract class Element extends Node implements ElementTraversal native "*Element
   /**
    * Deprecated, use [children] instead.
    */
-  @deprecated
   List<Element> get elements => this.children;
 
   /**