Remove Crypto from Base58

Since the Data extention has been moved to the Extensions
folder, the entry is no longer needed.

Author: MasterJ93

Sources/ATCryptography/BaseRadix/Base58.swift

@@ -6,7 +6,6 @@
 //
 
 import Foundation
-import Crypto
 import BigInt
 
 /// Represents a Base58 encoding alphabet.