drop jira link from linked-issues (#133)

diff --git a/migration/src/jira_util.py b/migration/src/jira_util.py
index f1bffea..deb36e7 100644
--- a/migration/src/jira_util.py
+++ b/migration/src/jira_util.py
@@ -330,7 +330,7 @@
         res = m.group(0)
         gh_number = issue_id_map.get(m.group(1))
         if gh_number and gh_number != gh_number_self:
-            res = f"#{gh_number} ({m.group(0)})"
+            res = f"#{gh_number}"
             # print(res)
         return res