Deleting Editions in MDG-F

Hi MDG experts

Is there a way to delete the "unwanted" Editions from the MDG  system ? Alternatively, is there an approach to change the period for Editions so that the number of Editions already created can be reduced to a smaller number ?

Essentially, we are trying to reduce the number of Editions that were created for testing purpose and are no longer required.

Regards

Neelesh