What is the ruling on donating to a charity through a bank transfer from an interest-based (usurious) bank, in order to dispose of ill-gotten wealth, and does this transfer discharge one's obligation?

There is no harm in transferring money through a usurious bank, and one's obligation regarding the unlawful money is discharged by this transfer due to the excuse for dealing with a usurious bank in Western countries, as the general Muslim population finds no escape from opening accounts there, and they are excused for dealing with them in matters necessitated by need.