Made ReplaceConverter abstract as it needs to be implemented in client libs, removed unsupported JsonConverterCtor attribute

CryptoExchange.Net/Converters/SystemTextJson/JsonConverterCtorAttribute.cs

@@ -1,31 +0,0 @@
-using System;
-using System.Text.Json.Serialization;
-
-namespace CryptoExchange.Net.Converters.SystemTextJson
-{
-    /// <summary>
-    /// Attribute for allowing specifying a JsonConverter with constructor parameters
-    /// </summary>
-    [AttributeUsage(AttributeTargets.Property)]
-    public class JsonConverterCtorAttribute : JsonConverterAttribute
-    {
-        private readonly object[] _parameters;
-        private readonly Type _type;
-
-        /// <summary>
-        /// ctor
-        /// </summary>
-        public JsonConverterCtorAttribute(Type type, params object[] parameters)
-        {
-            _type = type;
-            _parameters = parameters;
-        }
-
-        /// <inheritdoc />
-        public override JsonConverter CreateConverter(Type typeToConvert)
-        {
-            return (JsonConverter)Activator.CreateInstance(_type, _parameters)!;
-        }
-    }
-
-}

CryptoExchange.Net/Converters/SystemTextJson/ReplaceConverter.cs

@@ -8,7 +8,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
     /// <summary>
     /// Replace a value on a string property
     /// </summary>
-    public class ReplaceConverter : JsonConverter<string>
+    public abstract class ReplaceConverter : JsonConverter<string>
     {
         private readonly (string ValueToReplace, string ValueToReplaceWith)[] _replacementSets;