It's not possible to stop those alarms of being raised. They are always generated by DataMiner and serve as audit trailing.
As Luis also mentioned in his answer, it might be worth looking at some of those if they occur too often, e.g. DataMiner Agent lost. I would not expect this one to happen that often.
Information events like new client registered could also be useful for audit trailing if you need to track something.
Therefore DataMiner does not immediately have the option to disable those information events...