remove obsolete 'cash' payment method

Author: ajungg

core/src/main/java/io/snabble/sdk/PaymentMethod.java

@@ -3,8 +3,6 @@
 import com.google.gson.annotations.SerializedName;
 
 public enum PaymentMethod {
-    @SerializedName("cash")
-    CASH(false, false),
     @SerializedName("qrCodePOS")
     QRCODE_POS(false, false),
     @SerializedName("encodedCodes")

ui/src/main/java/io/snabble/sdk/ui/checkout/CheckoutView.java

@@ -111,9 +111,6 @@ public void onStateChanged(Checkout.State state) {
 
     private void displayPaymentView() {
         switch (checkout.getSelectedPaymentMethod()) {
-            case CASH:
-                displayView(new CheckoutStatusView(getContext()));
-                break;
             case TELECASH_DIRECT_DEBIT:
                 displayView(new CheckoutStatusView(getContext()));
                 break;

ui/src/main/java/io/snabble/sdk/ui/checkout/PaymentMethodView.java

@@ -53,7 +53,6 @@ class PaymentMethodView extends FrameLayout implements PaymentCredentialsStore.C
     private static Map<PaymentMethod, String> descriptions = new HashMap<>();
 
     static {
-        icons.put(PaymentMethod.CASH, R.drawable.ic_pm_sepa);
         icons.put(PaymentMethod.TELECASH_DIRECT_DEBIT, R.drawable.ic_pm_sepa);
         icons.put(PaymentMethod.QRCODE_POS, R.drawable.ic_pm_checkstand);
         icons.put(PaymentMethod.ENCODED_CODES, R.drawable.ic_pm_checkstand);