I can see on your screeshoot that you're reffering to the Epic Panel no the board itself. To remove the epic from this list you have to change the EpicStatus field to Done. You can do this from the Epic Panel->Select the issue->Click the small Square/triangle icon->"Mark as Done"

edZD.
  • jjn6eerbnd.pages.dev/267
  • jjn6eerbnd.pages.dev/335
  • jjn6eerbnd.pages.dev/145
  • jjn6eerbnd.pages.dev/322
  • jjn6eerbnd.pages.dev/96
  • jjn6eerbnd.pages.dev/306
  • jjn6eerbnd.pages.dev/304
  • jjn6eerbnd.pages.dev/175
  • jjn6eerbnd.pages.dev/393

    • jira remove task from epic