Why? The feature already exists somewhere else in Service Studio.

Doing 1-click publish, I follow next steps every time.

1. Remove Unused Dependencies from menu.
2. Open Manage Dependencies dialog. 
3. Refresh all and Apply to close the dialog.

This idea is to simplify this procedure slightly.

Alright got it.

I personally think what OutSystems should do is remove unused dependencies when deploying code to the next environment in Lifetime. 

This would make the complete remove unused dependencies manually in Service Studio absolute.