remove jira link (#636)

Author: sparsick

.github/ISSUE_TEMPLATE/config.yml

@@ -24,7 +24,3 @@ contact_links:
  - name: Project Mailing Lists
  url: https://maven.apache.org/mailing-lists.html
  about: Please ask a question or discuss here
-
- - name: Old JIRA Issues
- url: https://issues.apache.org/jira/projects/MPMD
- about: Please search old JIRA issues