Remove cache.

Author: SebastianStehle

sdk/Notifo.SDK/NotifoMobilePush/NotifoMobilePushImplementation.ios.cs

@@ -12,7 +12,6 @@
 using System.Net.Http;
 using System.Threading.Tasks;
 using Foundation;
-using Microsoft.Extensions.Caching.Memory;
 using Notifo.SDK.Extensions;
 using Notifo.SDK.Resources;
 using Serilog;
@@ -23,7 +22,6 @@ namespace Notifo.SDK.NotifoMobilePush
 {
     internal partial class NotifoMobilePushImplementation : NSObject
     {
-        private readonly IMemoryCache imageCache = new MemoryCache(new MemoryCacheOptions());
         private HttpClient httpClient;
         private INotificationHandler? notificationHandler;
 
@@ -300,15 +298,14 @@ public void DidReceiveNotificationResponse(UNNotificationResponse response)
         {
             try
             {
-                // TODO: Not really sure if the dictionary provides any value at all.
-                if (imageCache.TryGetValue(imageUrl, out string imagePath) && File.Exists(imagePath))
+                // Use the base64 value of the URL.
+                var imagePath = Path.Combine(FileSystem.CacheDirectory, imageUrl.ToBase64());
+
+                if (File.Exists(imagePath))
                 {
                     return imagePath;
                 }
 
-                // Use the base64 value of the URL.
-                imagePath = Path.Combine(FileSystem.CacheDirectory, imageUrl.ToBase64());
-
                 // Copy directly from the web stream to the image stream to reduce memory allocations.
                 using (var fileStream = new FileStream(imagePath, FileMode.Open))
                 {
@@ -318,8 +315,6 @@ public void DidReceiveNotificationResponse(UNNotificationResponse response)
                     }
                 }
 
-                imageCache.Set(imageUrl, imagePath);
-
                 return imagePath;
             }
             catch (Exception ex)