Fixing docs generation

tools/dom/docs/docs.json

 {
   "dart.dom.html": {
     "CanvasGradient": {
       "comment": [
         "/**",
         " * An opaque canvas object representing a gradient.",
         " *",
         " * Created by calling [createLinearGradient] or [createRadialGradient] on a",
         " * [CanvasRenderingContext2D] object.",
         " *",
@@ skipping 109 matching lines @@
         " * The base class for all documents.",
         " *",
         " * Each web page loaded in the browser has its own [Document] object, which is",
         " * typically an [HtmlDocument].",
         " *",
         " * If you aren't comfortable with DOM concepts, see the Dart tutorial",
         " * [Target 2: Connect Dart & HTML](http://www.dartlang.org/docs/tutorials/connect-dart-html/).",
         " */"
       ],
       "members": {
-        "createElement": [
-          "/// Deprecated: use new Element.tag(tagName) instead."
-        ],
         "querySelector": [
           "/**",
           " * Finds the first descendant element of this document that matches the",
           " * specified group of selectors.",
           " *",
           " * Unless your webpage contains multiple documents, the top-level query",
           " * method behaves the same as this method, so you should use it instead to",
           " * save typing a few characters.",
           " *",
           " * [selectors] should be a string using CSS selector syntax.",
@@ skipping 402 matching lines @@
           "   *",
           "   * [oldVersion] should match the database's current [version] exactly.",
           "   *",
           "   * * [Database.changeVersion](http://www.w3.org/TR/webdatabase/#dom-database-changeversion) from W3C.",
           "   */"
         ]
       }
     }
   }
 }