refactor: drop forum events from unserializable list

Author: mariajgrimaldi

openedx_events/tooling.py

@@ -24,9 +24,6 @@
     "org.openedx.content_authoring.course.certificate_config.changed.v1",
     "org.openedx.content_authoring.course.certificate_config.deleted.v1",
     "org.openedx.learning.user.notification.requested.v1",
-    "org.openedx.learning.thread.created.v1",
-    "org.openedx.learning.response.created.v1",
-    "org.openedx.learning.comment.created.v1",
     "org.openedx.learning.course.notification.requested.v1",
     "org.openedx.learning.ora.submission.created.v1",
 ]