Remove unused container field from HtmlParser (#150)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e294c41..8836bf6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 ## 0.15.0-dev
 
-- Drop `HtmlParser.lastPhase` and `HtmlParser.beforeRcDataPhase`. These fields
-  never had a value other than `null`.
+- Drop `lastPhase`, `beforeRcDataPhase`, and `container` fields from
+  `HtmlParser` class. These fields never had a value other than `null`.
 
 ## 0.14.0+4
 
diff --git a/lib/parser.dart b/lib/parser.dart
index 5dce969..6466fa0 100644
--- a/lib/parser.dart
+++ b/lib/parser.dart
@@ -80,8 +80,6 @@
 
   final List<ParseError> errors = <ParseError>[];
 
-  String container;
-
   bool firstStartTag = false;
 
   // TODO(jmesserly): use enum?