PaymentHandler: Remove PaymentAppManifest and PaymentAppOption.

content/browser/payments/payment_app.proto

Index: content/browser/payments/payment_app.proto
diff --git a/content/browser/payments/payment_app.proto b/content/browser/payments/payment_app.proto
index 88a2b2787f3e07664446659ab875dd9eff101951..c2eadb6d7953f5477e3c8a5212bb9c75b2c3ce9b 100644
--- a/content/browser/payments/payment_app.proto
+++ b/content/browser/payments/payment_app.proto
@@ -8,19 +8,6 @@ option optimize_for = LITE_RUNTIME;
 
 package content;
 
-message PaymentAppManifestProto {
-  optional string name = 1;
-  optional string icon = 2;
-  repeated PaymentAppOptionProto options = 3;
-}
-
-message PaymentAppOptionProto {
-  optional string name = 1;
-  optional string icon = 2;
-  optional string id = 3;
-  repeated string enabled_methods = 4;
-}
-
 message StoredPaymentInstrumentKeyInfoProto {
   optional uint64 insertion_order = 1;
   optional string key = 2;