fix: remove duplicate fi in cmd_continue

skills/kugetsu/scripts/kugetsu-session.sh

@@ -488,7 +488,6 @@ cmd_continue() {
     else
         message=$(build_dev_agent_message "$issue_ref" "$message")
     fi
-    fi
     
     local worktree_status=$(ensure_worktree "$issue_ref")
     if [ "$worktree_status" = "error" ]; then