Using Clock.Default in a few places.

AsyncRx.NET/System.Reactive.Async.Linq/System/Reactive/Linq/Operators/SkipLast.cs

@@ -85,7 +85,7 @@ namespace System.Reactive.Linq
             );
         }
 
-        public static IAsyncObserver<TSource> SkipLast<TSource>(IAsyncObserver<TSource> observer, TimeSpan duration) => SkipLast(observer, duration, TaskPoolAsyncScheduler.Default);
+        public static IAsyncObserver<TSource> SkipLast<TSource>(IAsyncObserver<TSource> observer, TimeSpan duration) => SkipLast(observer, duration, Clock.Default);
 
         public static IAsyncObserver<TSource> SkipLast<TSource>(IAsyncObserver<TSource> observer, TimeSpan duration, IClock clock)
         {

AsyncRx.NET/System.Reactive.Async.Linq/System/Reactive/Linq/Operators/TakeLast.cs

@@ -185,7 +185,7 @@ namespace System.Reactive.Linq
                 );
         }
 
-        public static (IAsyncObserver<TSource>, IAsyncDisposable) TakeLast<TSource>(IAsyncObserver<TSource> observer, TimeSpan duration) => TakeLast(observer, duration, TaskPoolAsyncScheduler.Default, TaskPoolAsyncScheduler.Default);
+        public static (IAsyncObserver<TSource>, IAsyncDisposable) TakeLast<TSource>(IAsyncObserver<TSource> observer, TimeSpan duration) => TakeLast(observer, duration, Clock.Default, TaskPoolAsyncScheduler.Default);
 
         public static (IAsyncObserver<TSource>, IAsyncDisposable) TakeLast<TSource>(IAsyncObserver<TSource> observer, TimeSpan duration, IAsyncScheduler scheduler) => TakeLast(observer, duration, scheduler, scheduler);
 

AsyncRx.NET/System.Reactive.Async.Linq/System/Reactive/Linq/Operators/TakeLastBuffer.cs

@@ -99,7 +99,7 @@ namespace System.Reactive.Linq
             );
         }
 
-        public static IAsyncObserver<TSource> TakeLastBuffer<TSource>(IAsyncObserver<IList<TSource>> observer, TimeSpan duration) => TakeLastBuffer(observer, duration, TaskPoolAsyncScheduler.Default);
+        public static IAsyncObserver<TSource> TakeLastBuffer<TSource>(IAsyncObserver<IList<TSource>> observer, TimeSpan duration) => TakeLastBuffer(observer, duration, Clock.Default);
 
         public static IAsyncObserver<TSource> TakeLastBuffer<TSource>(IAsyncObserver<IList<TSource>> observer, TimeSpan duration, IClock clock)
         {