[roadmap] Removed broken link with dead paragraph

Author: nemesifier

general/roadmap-2030.rst

@@ -307,9 +307,6 @@ Monitoring Improvements
   sensitive tasks, such as configuration changes and reactive network
   operations, are not delayed by resource intensive background workloads,
   such as those generated by the monitoring module.
-- **Release Milestone**: Address outstanding issues identified for the
-  `Monitoring 0.3 release
-  <https://github.com/openwisp/openwisp-monitoring/issues?q=is%3Aopen+is%3Aissue+milestone%3A%22OpenWISP+Monitoring+0.3+Release%22>`_.
 
 Networking Features
 -------------------