When you delete a framework, you have the option of deleting just the framework or deleting the framework and all of its contents.
To delete a framework:
Right-click on a part of the framework not occupied by another object.
Select either Area only to delete just the framework or Area and content to delete the framework and everything it holds.
Now, your framework is gone from the mural. If you choose to delete just the framework (area), all objects previously held in that framework are now directly on your mural.
For more on frameworks, check out these other articles: