Removed DARTIUM codegen for IDLS (sdk/lib/dartium)

tools/dom/templates/html/impl/impl_WorkerNavigator.darttemplate

Index: tools/dom/templates/html/impl/impl_WorkerNavigator.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_WorkerNavigator.darttemplate b/tools/dom/templates/html/impl/impl_WorkerNavigator.darttemplate
index 18707fb5a05a3fffcd9443fde8c6fed06efa1fd4..05179101a261400dea80128f8558ae40b14e95d8 100644
--- a/tools/dom/templates/html/impl/impl_WorkerNavigator.darttemplate
+++ b/tools/dom/templates/html/impl/impl_WorkerNavigator.darttemplate
@@ -7,17 +7,5 @@ part of $LIBRARYNAME;
 @DocsEditable()
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 $!MEMBERS
-$if DARTIUM
-  // Override these methods for Dartium _WorkerNavigator can't be abstract.
-  String get appCodeName => _blink.BlinkWorkerNavigator.instance.appCodeName_Getter_(this);
-  String get appName => _blink.BlinkWorkerNavigator.instance.appCodeName_Getter_(this);
-  String get appVersion => _blink.BlinkWorkerNavigator.instance.appVersion_Getter_(this);
-  bool get dartEnabled => _blink.BlinkWorkerNavigator.instance.dartEnabled_Getter_(this);
-  String get platform => _blink.BlinkWorkerNavigator.instance.platform_Getter_(this);
-  String get product => _blink.BlinkWorkerNavigator.instance.product_Getter_(this);
-  String get userAgent => _blink.BlinkWorkerNavigator.instance.userAgent_Getter_(this);
-  int get hardwareConcurrency => _blink.BlinkWorkerNavigator.instance.hardwareConcurrency_Getter_(this);
-  bool get onLine => _blink.BlinkWorkerNavigator.instance.onLine_Getter_(this);
-$endif
 }