Deletes all model Deltas targeting non-existent models.
A Delta is basically a 'diff' or list of modifications made to the components of a reference model. You can specify which modifications should be tracked in each delta (eg., track only expressions and constraints vs. tracking all animation, etc.). Each model can only have one delta associated to it and each delta contains the name of the model to which it is associated.
• See RemoveUnusedDeltas.1.js
Autodesk Softimage 2011