[Legacy - FileBased] Remove Shielded Transactions Support (#400)

## Purpose
Remove Shielded Transactions Support

## Changes
- Removed related to the shielded transfers logic. Removed TransferType
cases related the shielded transfers
- Add shielded transactions sunset pop up

ConcordiumWallet/Model/Database/TransferEntity.swift

@@ -64,12 +64,8 @@ extension TransferDataType {
             balanceChange = Int(cost) ?? 0
         default:
             switch transferType {
-            case .simpleTransfer, .transferToSecret: // transfer to public is included even if not finalized
+            case .simpleTransfer:
                 balanceChange = amountAsInt() + (Int(cost) ?? 0)
-            case .transferToPublic:
-                balanceChange = -amountAsInt() + (Int(cost) ?? 0)
-            case .encryptedTransfer:
-                balanceChange = (Int(cost) ?? 0)
             case .registerDelegation, .removeDelegation, .updateDelegation:
                 balanceChange = (Int(cost) ?? 0)
             case .registerBaker, .updateBakerKeys, .updateBakerPool, .updateBakerStake, .removeBaker, .configureBaker:
@@ -93,10 +89,6 @@ extension TransferDataType {
             switch transferType {
             case .simpleTransfer:
                 balanceChange = 0
-            case .transferToSecret:
-                balanceChange = -amountAsInt()// shielding is included even if not finalized
-            case .encryptedTransfer, .transferToPublic:
-                balanceChange = amountAsInt() + 0 // the cost is taken from the public balance
             case .registerDelegation, .removeDelegation, .updateDelegation:
                 balanceChange = 0
             case .registerBaker, .updateBakerKeys, .updateBakerPool, .updateBakerStake, .removeBaker, .configureBaker:

ConcordiumWallet/Model/TransferType.swift

@@ -10,9 +10,6 @@ import Foundation
 
 enum TransferType: String, Codable {
     case simpleTransfer
-    case encryptedTransfer
-    case transferToSecret
-    case transferToPublic
 
     case registerDelegation
     case updateDelegation

ConcordiumWallet/Resources/Assets.xcassets/icons/ico_unshield.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "ico_unshield.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ConcordiumWallet/Service/MobileWallet.swift

@@ -131,9 +131,6 @@ class MobileWallet: MobileWalletProtocol {
             let revealedAttributes = account.revealedAttributes.map({
                 $0.key
             })
-
-//            return requestPasswordDelegate.requestUserPassword(keychain: keychain)
-//            .flatMap { (pwHash) -> AnyPublisher<CreateCredentialRequest, Error> in
             return self.createCredential(global: global,
                                           account: account,
                                           revealedAttributes: revealedAttributes,
@@ -244,9 +241,6 @@ class MobileWallet: MobileWalletProtocol {
         let privateAccountKeys = try getPrivateAccountKeys(for: fromAccount, pwHash: pwHash).get()
 
         var secretEncryptionKey: String?
-        if transferType == .transferToPublic || transferType == .encryptedTransfer {
-            secretEncryptionKey = try getSecretEncryptionKey(for: fromAccount, pwHash: pwHash).get()
-        }
 
         let makeCreateTransferRequest = MakeCreateTransferRequest(from: fromAccount.address,
                                                                   to: toAccount,
@@ -276,12 +270,6 @@ class MobileWallet: MobileWalletProtocol {
         switch transferType {
         case .simpleTransfer:
             return try CreateTransferRequest(walletFacade.createTransfer(input: input))
-        case .transferToSecret:
-            return try CreateTransferRequest(walletFacade.createShielding(input: input))
-        case .transferToPublic:
-             return try CreateTransferRequest(walletFacade.createUnshielding(input: input))
-        case .encryptedTransfer:
-             return try CreateTransferRequest(walletFacade.createEncrypted(input: input))
         case .registerDelegation, .removeDelegation, .updateDelegation:
             return try CreateTransferRequest(walletFacade.createConfigureDelegation(input: input))
         case .registerBaker, .updateBakerKeys, .updateBakerPool, .updateBakerStake, .removeBaker, .configureBaker: