remove a couple of old ifdefs

Rx.NET/Source/Microsoft.Reactive.Testing/Recorded.cs

@@ -13,9 +13,7 @@ namespace Microsoft.Reactive.Testing
     /// Record of a value including the virtual time it was produced on.
     /// </summary>
     /// <typeparam name="T">Type of the value.</typeparam>
-#if !NO_DEBUGGER_ATTRIBUTES
     [DebuggerDisplay("{Value}@{Time}")]
-#endif
 #if !NO_SERIALIZABLE
     [Serializable]
 #endif

Rx.NET/Source/Microsoft.Reactive.Testing/Subscription.cs

@@ -11,9 +11,7 @@ namespace Microsoft.Reactive.Testing
     /// <summary>
     /// Records information about subscriptions to and unsubscriptions from observable sequences.
     /// </summary>
-#if !NO_DEBUGGER_ATTRIBUTES
     [DebuggerDisplay("({Subscribe}, {Unsubscribe})")]
-#endif
 #if !NO_SERIALIZABLE
     [Serializable]
 #endif