Removed DomName, DosEditable, and experimental annoations they are unused.

R=kevmoo@google.com,vsm@google.com

Fixes #32304

Change-Id: Ia2c8f99f0125c4d4bd0f95a792ff2af8a58e3599
Reviewed-on: https://dart-review.googlesource.com/60400
Commit-Queue: Terry Lucas <terry@google.com>
Reviewed-by: Kevin Moore <kevmoo@google.com>

tools/dom/scripts/css_code_generator.py

@@ -144,7 +144,6 @@ $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME $EXTENDS with
   }
 
 
-  @DomName('CSSStyleDeclaration.setProperty')
   void setProperty(String propertyName, String value, [String priority]) {
     return _setPropertyHelper(_browserPropertyName(propertyName),
       value, priority);