Deleted code that wasn't actually doing anything.

tools/dom/scripts/htmldartgenerator.py

Index: tools/dom/scripts/htmldartgenerator.py
diff --git a/tools/dom/scripts/htmldartgenerator.py b/tools/dom/scripts/htmldartgenerator.py
index fb116d176b6c3dc67b0ee815a1acf9df9c225397..c617c29ced9cda7e8e62fc476fc821f335e998b2 100644
--- a/tools/dom/scripts/htmldartgenerator.py
+++ b/tools/dom/scripts/htmldartgenerator.py
@@ -386,15 +386,6 @@ class HtmlDartGenerator(object):
               METADATA=metadata,
               FACTORY_PARAMS=constructor_info.ParametersAsArgumentList())
 
-          for index, param_info in enumerate(constructor_info.param_infos):
-            if param_info.is_optional:
-              dispatcher_emitter.Emit(
-                '    if ($OPT_PARAM_NAME == null) {\n'
-                '      return $FACTORY._create($FACTORY_PARAMS);\n'
-                '    }\n',
-                OPT_PARAM_NAME=param_info.name,
-                FACTORY=factory_name,
-                FACTORY_PARAMS=constructor_info.ParametersAsArgumentList(index))
         else:
           inits = self._members_emitter.Emit(
               '\n  $(METADATA)'