[Bindings][Refactoring] Remove attribute filters from .tmpl files

third_party/WebKit/Source/bindings/templates/partial_interface.h.tmpl

 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 #ifndef {{v8_class_or_partial}}_h
 #define {{v8_class_or_partial}}_h
 
 {% for filename in header_includes %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
 
-{% if attributes|origin_trial_enabled_attributes %}
+{% if origin_trial_attributes %}
 class ScriptState;
 {% endif %}
 
 class {{v8_class_or_partial}} {
   STATIC_ONLY({{v8_class_or_partial}});
  public:
   static void initialize();
   {% for method in methods if method.is_custom %}
   static void {{method.name}}MethodCustom(const v8::FunctionCallbackInfo<v8::Value>&);
   {% endfor %}
@@ skipping 20 matching lines @@
 
  private:
   static void install{{v8_class}}Template(v8::Isolate*, const DOMWrapperWorld&, v8::Local<v8::FunctionTemplate> interfaceTemplate);
 };
 
 }  // namespace blink
 
 #endif  // {{v8_class_or_partial}}_h
 
 {% endfilter %}{# format_blink_cpp_source_code #}