registry: remove old hasSaveState property

Author: osy

Platform/VMData.swift

@@ -396,7 +396,7 @@ extension VMData {
     var stateLabel: String {
         switch state {
         case .stopped:
-            if registryEntry?.hasSaveState == true {
+            if registryEntry?.isSuspended == true {
                 return NSLocalizedString("Suspended", comment: "VMData");
             } else {
                 return NSLocalizedString("Stopped", comment: "VMData");

Platform/iOS/UTMDataExtension.swift

@@ -34,7 +34,7 @@ extension UTMData {
         guard let wrapped = vm.wrapped else {
             return
         }
-        if wrapped.registryEntry.hasSaveState {
+        if wrapped.registryEntry.isSuspended {
             wrapped.requestVmDeleteState()
         }
     }

Platform/macOS/Display/VMDisplayWindowController.swift

@@ -287,7 +287,7 @@ extension VMDisplayWindowController: NSWindowDelegate {
         guard !isSecondary else {
             return true
         }
-        guard !(vm.state == .stopped || (vm.state == .paused && vm.registryEntry.hasSaveState)) else {
+        guard !(vm.state == .stopped || (vm.state == .paused && vm.registryEntry.isSuspended)) else {
             return true
         }
         guard !isNoQuitConfirmation else {

Services/UTMRegistryEntry.swift

@@ -354,20 +354,6 @@ extension UTMRegistryEntry {
     #endif
 }
 
-// MARK: - Objective C bridging
-// FIXME: these are NOT synchronized to the actor
-@objc extension UTMRegistryEntry {
-    var hasSaveState: Bool {
-        get {
-            _isSuspended
-        }
-        
-        set {
-            _isSuspended = newValue
-        }
-    }
-}
-
 extension UTMRegistryEntry {
     struct File: Codable, Identifiable {
         var url: URL