Revert "Fixed: Serialize flag enum as string also"

This reverts commit b0ae4e9a60.

src/NzbDrone.Core/Datastore/Converters/EmbeddedDocumentConverter.cs

@@ -21,7 +21,7 @@ namespace NzbDrone.Core.Datastore.Converters
                 WriteIndented = true
             };
 
-            serializerSettings.Converters.Add(new JsonStringEnumConverter(JsonNamingPolicy.CamelCase, true));
+            serializerSettings.Converters.Add(new NoFlagsStringEnumConverter());
             serializerSettings.Converters.Add(new TimeSpanConverter());
             serializerSettings.Converters.Add(new UtcConverter());
 

src/NzbDrone.Core/Datastore/Converters/NoFlagsStringEnumConverter.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace NzbDrone.Core.Datastore.Converters
+{
+    public class NoFlagsStringEnumConverter : JsonConverterFactory
+    {
+        private static JsonStringEnumConverter s_stringEnumConverter = new JsonStringEnumConverter(JsonNamingPolicy.CamelCase, false);
+
+        public override bool CanConvert(Type typeToConvert)
+        => typeToConvert.IsEnum && !typeToConvert.IsDefined(typeof(FlagsAttribute), inherit: false);
+
+        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+        => s_stringEnumConverter.CreateConverter(typeToConvert, options);
+    }
+}