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

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

Index: tools/dom/templates/html/impl/impl_HTMLAudioElement.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_HTMLAudioElement.darttemplate b/tools/dom/templates/html/impl/impl_HTMLAudioElement.darttemplate
index e8da20008c688a44a13d57580a6a695422f5bf3b..f9895fbe0a59d0889805f569ac40b256e6eae4cd 100644
--- a/tools/dom/templates/html/impl/impl_HTMLAudioElement.darttemplate
+++ b/tools/dom/templates/html/impl/impl_HTMLAudioElement.darttemplate
@@ -7,14 +7,5 @@ part of $LIBRARYNAME;
 @DocsEditable()
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 $!MEMBERS
-$if JSINTEROP
-  factory AudioElement([String src]) {
-    if (src == null)
-      return _blink.BlinkHTMLAudioElement.instance.constructorCallback_0_();
-    else
-      return _blink.BlinkHTMLAudioElement.instance.constructorCallback_1_(src);
-  }
-$else
   factory AudioElement([String src]) => new AudioElement._(src);
-$endif
 }