Fix readme to only reference required imports
diff --git a/README.md b/README.md
index 1610d3b..8a71da4 100644
--- a/README.md
+++ b/README.md
@@ -13,13 +13,12 @@
 
 Parsing CSS is easy!
 ```dart
-import 'package:csslib/parser.dart' show parse;
-import 'package:csslib/css.dart';
+import 'package:csslib/parser.dart';
 
 main() {
   var stylesheet = parse(
       '.foo { color: red; left: 20px; top: 20px; width: 100px; height:200px }');
-  print(stylesheet.toString());
+  print(stylesheet.toDebugString());
 }
 ```