You can now remove a call from your call history view in Teams.
To do so just access the Calls app to access the call history and open the contextual menu of the call you want to remove to choose Remove from view
If this is not yet available for you, the deployment in under way and expected to be completed by mid-September.
This is/will be available for all Teams client (desktop, web and mobile).
Removing a call from the history view does not impact back-end logging.