refactor encodings

src/commonMain/kotlin/com/infendro/encoding/Encoding.kt

@@ -1,10 +1,6 @@
 package com.infendro.encoding
 
 interface Encoding {
-    val alphabet: ByteArray
-    val base: Int
-        get() = alphabet.size
-
     fun encode(bytes: ByteArray): ByteArray
     fun decode(bytes: ByteArray): ByteArray
 }