Hardcode the sliding sync proxy. (#502)

* Add support for migrating between versions.
* Rename InfoPlistReader property.
* Bump SDK version.

ElementX/Sources/Screens/Authentication/ServerSelection/ServerSelectionModels.swift

@@ -55,8 +55,6 @@ struct ServerSelectionViewState: BindableState {
 struct ServerSelectionBindings {
     /// The homeserver address input by the user.
     var homeserverAddress: String
-    /// The sliding sync proxy address input by the user.
-    var slidingSyncProxyAddress: String
     /// Information describing the currently displayed alert.
     var alertInfo: AlertInfo<ServerSelectionErrorType>?
 }

ElementX/Sources/Screens/Authentication/ServerSelection/ServerSelectionViewModel.swift

@@ -22,8 +22,7 @@ class ServerSelectionViewModel: ServerSelectionViewModelType, ServerSelectionVie
     var callback: (@MainActor (ServerSelectionViewModelAction) -> Void)?
 
     init(homeserverAddress: String, isModallyPresented: Bool) {
-        let bindings = ServerSelectionBindings(homeserverAddress: homeserverAddress,
-                                               slidingSyncProxyAddress: ServiceLocator.shared.settings.slidingSyncProxyBaseURLString)
+        let bindings = ServerSelectionBindings(homeserverAddress: homeserverAddress)
         
         super.init(initialViewState: ServerSelectionViewState(bindings: bindings,
                                                               isModallyPresented: isModallyPresented))
@@ -32,11 +31,6 @@ class ServerSelectionViewModel: ServerSelectionViewModelType, ServerSelectionVie
     override func process(viewAction: ServerSelectionViewAction) async {
         switch viewAction {
         case .confirm:
-            if !state.bindings.slidingSyncProxyAddress.isEmpty,
-               state.bindings.slidingSyncProxyAddress != ServiceLocator.shared.settings.slidingSyncProxyBaseURLString {
-                ServiceLocator.shared.settings.slidingSyncProxyBaseURLString = state.bindings.slidingSyncProxyAddress
-            }
-            
             callback?(.confirm(homeserverAddress: state.bindings.homeserverAddress))
         case .dismiss:
             callback?(.dismiss)

ElementX/Sources/Screens/Authentication/ServerSelection/View/ServerSelectionScreen.swift

@@ -71,16 +71,6 @@ struct ServerSelectionScreen: View {
                 .onSubmit(submit)
                 .accessibilityIdentifier("addressTextField")
             
-            TextField(ElementL10n.ftueAuthChooseServerEntryHint, text: $context.slidingSyncProxyAddress)
-                .textFieldStyle(.elementInput(labelText: "Sliding sync proxy URL"))
-                .keyboardType(.URL)
-                .autocapitalization(.none)
-                .disableAutocorrection(true)
-                .submitLabel(.done)
-                .onSubmit(submit)
-                .accessibilityIdentifier("slidingSyncProxyAddressTextField")
-                .padding(.bottom, 8)
-            
             Button(action: submit) {
                 Text(context.viewState.buttonTitle)
             }