Removed partials used by AoT analyzers. Not needed for types never pa…

…ssed to a native WinRT method.

See #507 (comment)

components/Media/src/Extensions/System.Threading.Tasks/AsyncMutex.cs

@@ -10,7 +10,7 @@ namespace CommunityToolkit.WinUI.Media;
 /// An <see langword="async"/> <see cref="AsyncMutex"/> implementation that can be easily used inside a <see langword="using"/> block
 /// </summary>
 #pragma warning disable CA1001 // Types that own disposable fields should be disposable
-internal sealed partial class AsyncMutex
+internal sealed class AsyncMutex
 #pragma warning restore CA1001 // Types that own disposable fields should be disposable
 {
     /// <summary>
@@ -32,7 +32,7 @@ public async Task<IDisposable> LockAsync()
     /// <summary>
     /// Private class that implements the automatic release of the semaphore
     /// </summary>
-    private sealed partial class Lock : IDisposable
+    private sealed class Lock : IDisposable
     {
         /// <summary>
         /// The <see cref="SemaphoreSlim"/> instance of the parent class