When we develop actions and specially change them later we sometimes remove code in the flow.
When a variable is not used anymore after changing / deleting some code in the flow service center warns you about this (yellow line under the variable and a message in the warning panel).
When an aggregate is not used anymore service center does not warn you about this.
I would like service center to warn me so I can check if the aggregate can be deleted or not.
In the example below the GetUsers aggregate is not used.