IDL compiler: remove blank line for void methods

Source/bindings/templates/methods.cpp

 {##############################################################################}
 {% macro generate_method(method) %}
 static void {{method.name}}Method(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     {{cpp_class_name}}* imp = {{v8_class_name}}::toNative(args.Holder());
     {% if method.idl_type == 'void' %}
     {{method.cpp_value}};
-
     {% else %}
     {{method.v8_set_return_value}};
     {% endif %}
     return;
 }
 {% endmacro %}
 
 
 {##############################################################################}
 {% macro method_callback(method) %}
 static void {{method.name}}MethodCallback(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     {{cpp_class_name}}V8Internal::{{method.name}}Method(args);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "Execution");
 }
 {% endmacro %}