8750 Remove unneeded workaround for ToS cancellation

We used this workaround to cancel discovery for specific errors, but as of c:fa59a2fa8063c6aa8e0d93879dbb5745ab2c0b81  it is dealt with in the BuiltInCardReaderConnectionController by ignoring subsequent discoveries once we show an error.

Author: joshheald

Hardware/Hardware/CardReader/StripeCardReader/StripeCardReaderService.swift

@@ -470,10 +470,6 @@ extension StripeCardReaderService: CardReaderService {
                         .softwareUpdate(underlyingError: underlyingError, batteryLevel: nil) :
                         .connection(underlyingError: underlyingError)
                     promise(.failure(serviceError))
-
-                    if case .appleBuiltInReaderTOSAcceptanceCanceled = underlyingError {
-                        self.discoveryCancellable?.cancel({ _ in })
-                    }
                 }
 
                 if let reader = reader {