Revert "Dartium w/ JsInterop enabled"

tools/dom/templates/html/dartium/web_sql_dartium.darttemplate

Index: tools/dom/templates/html/dartium/web_sql_dartium.darttemplate
diff --git a/tools/dom/templates/html/dartium/web_sql_dartium.darttemplate b/tools/dom/templates/html/dartium/web_sql_dartium.darttemplate
index 2741f46e86533a957029943514194aeca72d52e4..9823042850309dfe193d8ea5066c94d2261016b5 100644
--- a/tools/dom/templates/html/dartium/web_sql_dartium.darttemplate
+++ b/tools/dom/templates/html/dartium/web_sql_dartium.darttemplate
@@ -1,4 +1,3 @@
-
 // DO NOT EDIT - unless you are editing documentation as per:
 // https://code.google.com/p/dart/wiki/ContributingHTMLDocumentation
 // Auto-generated dart:audio library.
@@ -22,12 +21,6 @@ import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
 import 'dart:_blink' as _blink;
-import 'dart:js' as js;
-
-// Need a default constructor for constructing classes with mixins that are
-// also extending NativeFieldWrapperClass2.  Defining JsoNativeFieldWrapper
-// extending NativeFieldWrapperClass2 creates a default constructor.
-class JsoNativeFieldWrapper extends NativeFieldWrapperClass2 {}
 
 $!GENERATED_DART_FILES
 // FIXME: Can we make this private?