Remove Collection, Collections and clean up List/Set/Queue implementations of retain/remove.

sdk/lib/web_sql/dartium/web_sql_dartium.dart

Index: sdk/lib/web_sql/dartium/web_sql_dartium.dart
diff --git a/sdk/lib/web_sql/dartium/web_sql_dartium.dart b/sdk/lib/web_sql/dartium/web_sql_dartium.dart
index 87b3c18ebf82780f7e5239c3cb63bbc8c0fd5654..eb99e16f4ea97b6accdd727a49cee783e2042058 100644
--- a/sdk/lib/web_sql/dartium/web_sql_dartium.dart
+++ b/sdk/lib/web_sql/dartium/web_sql_dartium.dart
@@ -372,14 +372,6 @@ class SqlResultSetRowList extends NativeFieldWrapperClass1 implements List<Map>
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
-  void removeAll(Iterable elements) {
-    throw new UnsupportedError("Cannot remove from immutable List.");
-  }
-
-  void retainAll(Iterable elements) {
-    throw new UnsupportedError("Cannot remove from immutable List.");
-  }
-
   void removeWhere(bool test(Map element)) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }