You can easily delete any collection that you own (that you have created). Deleting a collection does not modify or delete the file(s) assigned to that collection.
To delete a collection:
1. Open the Your collections overview.
2. Select the collection(s) that you want to delete, or open a collection.
3. From the toolbox, select Delete. A confirmation window is displayed.
4. Click Delete.
The selected collections are deleted.
NOTE: Be careful when deleting a shared collection, because this may affect the work of others.