fix(cypress): remove duplicate SepaDebit key from Commons.js bank_debit_pm
SepaDebit was an existing unused key in bank_debit_pm. The Sepa key (added
in da0f163898) covers the same config and is the key referenced by the
45-BankDebit.cy.js spec. Removing SepaDebit per PR review feedback.
Co-Authored-By: Paperclip <noreply@paperclip.ing>