Revert previous fix

Author: MaggieKimani1

src/Microsoft.OpenApi.Readers/V2/OpenApiOperationDeserializer.cs

@@ -67,7 +67,7 @@ internal static partial class OpenApiV2Deserializer
                 {
                     "produces", (o, n) => {
                         var produces = n.CreateSimpleList(s => s.GetScalarValue());
-                        if (produces.Count > 0) {
+                        if (produces != null) {
                             n.Context.SetTempStorage(TempStorageKeys.OperationProduces, produces);
                         }
                     }

src/Microsoft.OpenApi.Readers/V2/OpenApiResponseDeserializer.cs

@@ -73,34 +73,47 @@ private static void ProcessProduces(MapNode mapNode, OpenApiResponse response, P
             }
 
             var produces = context.GetFromTempStorage<List<string>>(TempStorageKeys.OperationProduces)
-                ?? new List<string> { "application/octet-stream" };
+                ?? context.GetFromTempStorage<List<string>>(TempStorageKeys.GlobalProduces);
 
-            var schema = context.GetFromTempStorage<OpenApiSchema>(TempStorageKeys.ResponseSchema, response);
-
-            foreach (var produce in produces)
+            if (produces != null)
             {
+                var schema = context.GetFromTempStorage<OpenApiSchema>(TempStorageKeys.ResponseSchema, response);
 
-                if (response.Content.ContainsKey(produce) && response.Content[produce] != null)
-                {
-                    if (schema != null)
-                    {
-                        response.Content[produce].Schema = schema;
-                        ProcessAnyFields(mapNode, response.Content[produce], _mediaTypeAnyFields);
-                    }
-                }
-                else
+                if (produces.Count == 0 && schema != null)
                 {
                     var mediaType = new OpenApiMediaType
                     {
                         Schema = schema
                     };
 
-                    response.Content.Add(produce, mediaType);
+                    response.Content.Add(string.Empty, mediaType);
                 }
-            }
 
-            context.SetTempStorage(TempStorageKeys.ResponseSchema, null, response);
-            context.SetTempStorage(TempStorageKeys.ResponseProducesSet, true, response);
+                foreach (var produce in produces)
+                {
+
+                    if (response.Content.ContainsKey(produce) && response.Content[produce] != null)
+                    {
+                        if (schema != null)
+                        {
+                            response.Content[produce].Schema = schema;
+                            ProcessAnyFields(mapNode, response.Content[produce], _mediaTypeAnyFields);
+                        }
+                    }
+                    else
+                    {
+                        var mediaType = new OpenApiMediaType
+                        {
+                            Schema = schema
+                        };
+
+                        response.Content.Add(produce, mediaType);
+                    }
+                }
+
+                context.SetTempStorage(TempStorageKeys.ResponseSchema, null, response);
+                context.SetTempStorage(TempStorageKeys.ResponseProducesSet, true, response);
+            }
         }
 
         private static void LoadExamples(OpenApiResponse response, ParseNode node)