Remove unnecessary async annotation in demo (#241)

Author: rebello95

Examples/ElizaSharedSources/AppSources/MessagingView.swift

@@ -84,7 +84,7 @@ struct MessagingView<ViewModel: MessagingViewModel>: View {
         .toolbar {
             ToolbarItem(placement: .navigationBarTrailing) {
                 Button("End Chat") {
-                    Task { await self.viewModel.endChat() }
+                    self.viewModel.endChat()
                     self.presentationMode.wrappedValue.dismiss()
                 }
             }

Examples/ElizaSharedSources/AppSources/MessagingViewModel.swift

@@ -35,7 +35,7 @@ protocol MessagingViewModel: ObservableObject {
     func send(_ message: String) async
 
     /// End the chat session (and close connections if needed).
-    func endChat() async
+    func endChat()
 }
 
 /// View model that uses unary requests for messaging.
@@ -60,7 +60,7 @@ final class UnaryMessagingViewModel: MessagingViewModel {
         ))
      }
 
-    func endChat() async {}
+    func endChat() {}
 }
 
 /// View model that uses bidirectional streaming for messaging.