INT-15677: Delete discussion event is now done by core

Author: rmonterroza

tests/lib_test.php

@@ -3607,7 +3607,7 @@ public function test_hsuforum_word_count() {
      */
 
     public function test_hsuforum_scale_dependency_form() {
-        $this->markTestSkipped('Skipped since the 3.8.1 merge, the scale property is no longer present. To be fixed in INT-15843');
+        $this->markTestSkipped('Skipped since the 3.8 grade API changes, the scale property was removed. To be fixed in INT-15881');
         $this->resetAfterTest();
         $this->setAdminUser();
         $course = get_course(1);