You can delete a Composer Solution Pack solution. Deleting a solution deletes the button and removes it from any page layout where it was added. All underlying reports, queries, and templates are not removed unless deleted manually.
To delete a Composer Solution Pack solution:
Before you begin you must have a Composer Solution Pack solution installed.
Open the solution record for the solution you want to delete.
ClickDelete.
When the confirmation dialog box appears, clickOK.