Remove broken link from readme

Fixes https://github.com/dart-lang/html/issues/91
diff --git a/README.md b/README.md
index 21cc312..9706dac 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,6 @@
-This is a pure [Dart][dart] [html5 parser][html5parse].
+This is a pure Dart HTML5 parser.
 It's a port of [html5lib](https://github.com/html5lib/html5lib-python) from 
 Python. 
-Since it's 100% Dart you can use it safely from a script or server side app.
-
-(Formerly known as `package:html5lib`.)
 
 # Usage
 
@@ -24,5 +21,4 @@
 There's also `parseFragment` for parsing a document fragment, and `HtmlParser`
 if you want more low level control.
 
-[dart]: https://www.dartlang.org/
 [html5parse]: http://dev.w3.org/html5/spec/parsing.html