Removed the do-nothing getSizeMethod from BlobStorage.

src/ZODB/blob.py

@@ -782,13 +782,6 @@ class BlobStorage(SpecificationDecoratorBase):
 
         return result
 
-    @non_overridable
-    def getSize(self):
-        """Return the size of the database in bytes."""
-        # XXX The old way of computing is way to resource hungry. We need to
-        # do some kind of estimation instead.
-        return getProxiedObject(self).getSize()
-
     @non_overridable
     def undo(self, serial_id, transaction):
         undo_serial, keys = getProxiedObject(self).undo(serial_id, transaction)