CentraSite users with the appropriate permissions can delete existing assets. This standard functionality is described in the section Deleting an Asset in the document Using the Asset Catalog.
Generally, asset instances that are created and used by suite products are governed by policies that prevent their modification or deletion. The predefined design/change-time policy "Prevent Editing of webMethods Assets" is an example of such a policy. This means that a CentraSite user will normally not be able to modify or delete the asset, due to the rules defined in the policy.
However, a user with the "Modify Assets" permission, or with a permission that implies the "Modify Assets" permission, can modify assets regardless of the policy settings. Also, if the suite product does not define a deletion policy for its assets, this gives CentraSite users with the appropriate permissions the theoretical possibility of modifying or deleting the assets. If you modify or delete such an asset in CentraSite, this may lead to inconsistencies or errors in the product that created the asset, if that product requires the asset definition to be still present and unchanged.
Deletion of an asset that belongs to a suite asset type should normally only be done using the Retract feature of the suite's Designer user interface, rather than as a CentraSite user.
