You want to delete a KeyUserSolution from the Custom Object Builder.
Reproducing the Issue
1. Go to Administrator Work Center
2. Go to Custom Object Builder
3. You will see the following:
4. Click on the button "Delete Solution" in case of you want to delete the entire solution(all the Custom Objects plus the KeyUserSolution)
5. In case of you want to delete a single Custom Object there is an option to delete it by clicking on the Trash Can Icon which will be in the very same line of the Object you want to delete
By clicking on "Delete Solution" button, please be aware that you will be deleting the entire KeyUserSolution with all it's Custom Objects.
OBS: Deletion of Custom Solutions is not a supported scenario in Productive environments.
KBA , LOD-CRM-EMP , Employee , How To