Remove rendundant using from Base58 Helper

Signed-off-by: Xen <lordofxen@deskasoft.com>

Author: LordOfXen

HashifyNet/Core/DataType/Base58/Base58Helper.cs

@@ -27,9 +27,6 @@
 // ******************************************************************************
 // *
 
-using HashifyNet.Algorithms.Blake2;
-using HashifyNet.Algorithms.SHA256;
-using HashifyNet.Core.Utilities;
 using System;
 using System.Linq;
 using System.Numerics;