remove duplicated KeybytesToHex

Author: magicxyyz

trie/encoding.go

@@ -106,10 +106,6 @@ func keybytesToHex(str []byte) []byte {
 	return nibbles
 }
 
-func KeybytesToHex(str []byte) []byte {
-	return keybytesToHex(str)
-}
-
 // hexToKeybytes turns hex nibbles into key bytes.
 // This can only be used for keys of even length.
 func hexToKeybytes(hex []byte) []byte {