Fix warning

Author: slozier

Src/IronPython.Modules/audioop.cs

@@ -10,16 +10,17 @@
 using IronPython.Runtime.Exceptions;
 using IronPython.Runtime.Types;
 
-using NotNullOnReturnAttribute = System.Diagnostics.CodeAnalysis.NotNullAttribute;
 using NotNullAttribute = Microsoft.Scripting.Runtime.NotNullAttribute;
 
 [assembly: PythonModule("audioop", typeof(IronPython.Modules.PythonAudioOp))]
 namespace IronPython.Modules {
     public static class PythonAudioOp {
+#pragma warning disable IPY01 // Parameter which is marked not nullable does not have the NotNullAttribute
         [SpecialName]
-        public static void PerformModuleReload([NotNullOnReturn] PythonContext/*!*/ context, [NotNullOnReturn] PythonDictionary/*!*/ dict) {
+        public static void PerformModuleReload(PythonContext/*!*/ context, PythonDictionary/*!*/ dict) {
             context.EnsureModuleException("audiooperror", dict, "error", "audioop");
         }
+#pragma warning restore IPY01 // Parameter which is marked not nullable does not have the NotNullAttribute
 
         private static PythonType error(CodeContext/*!*/ context) => (PythonType)context.LanguageContext.GetModuleState("audiooperror");