It is possible to:
1. Delete ALL alarms from a specific source.
2. Delete multiple alarms from a specific source within a time window.
3. Delete multiple alarms from a specific source using the alarm IDS.
OI SaaS 24.2
You cannot delete the alarms directly, but you can close it.
Select the required filter and select all alarms , then there will be a popup asking to Select X alarms in filter to 'Clear' . Click on the hyperlink and confirm for the deletion. This step will initiate to close all the alarms with the matching filter criteria.