code: public void deleteMergeRequestDiscussionNote(Object projectIdOrPath, Integer mergeRequestIid,
              Integer discussionId, Integer noteId)  throws GitLabApiException {
          delete(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath),
                  "merge_requests", mergeRequestIid, "discussions", noteId);
      }
docs: Deletes an existing discussion note of a merge request.
  
  <pre><code>GitLab Endpoint: DELETE /projects/:id/merge_requests/:merge_request_iid/discussions/:discussion_id/notes/:note_id</code></pre>
  
  @param projectIdOrPath projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
  @param mergeRequestIid mergeRequestIid the internal ID of the merge request
  @param discussionId the ID of a discussion
  @param noteId the note ID to delete
  @throws GitLabApiException if any exception occurs during execution