[PM-5548] Eliminate in-app purchase logic (#7433)

* Eliminate in-app purchase logic

* Remove more in-app logic found, for payment and subscription management

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Co-authored-by: Lotus Scott <148992878+lscottbw@users.noreply.github.com>

libs/common/src/billing/enums/payment-method-type.enum.ts

@@ -5,7 +5,5 @@ export enum PaymentMethodType {
   BitPay = 3,
   Credit = 4,
   WireTransfer = 5,
-  AppleInApp = 6,
-  GoogleInApp = 7,
   Check = 8,
 }