diff --git a/encoding/binary/binary.go b/encoding/binary/binary.go
deleted file mode 100644
index 8e339a8..0000000
--- a/encoding/binary/binary.go
+++ /dev/null
@@ -1,68 +0,0 @@
-package binary
-
-import (
-	"encoding/binary"
-	"fmt"
-	"strconv"
-	"strings"
-)
-
-// StrToBytes converts string("00 00 00 00 00 00 00 00") to []byte
-func StrToBytes(str string) []byte {
-	bytes := make([]byte, 8)
-	for i, e := range strings.Fields(str) {
-		b, _ := strconv.ParseUint(e, 16, 64)
-		bytes[i] = byte(b)
-	}
-	return bytes
-}
-
-// BytesToStr converts []byte to string("00 00 00 00 00 00 00 00")
-func BytesToStr(bytes ...byte) string {
-	strs := []string{}
-	for _, b := range bytes {
-		strs = append(strs, fmt.Sprintf("%02x", b))
-	}
-	return strings.Join(strs, " ")
-}
-
-// BytesToUInt converts []byte to uint64
-func BytesToUInt(bytes ...byte) uint64 {
-	padding := make([]byte, 8-len(bytes))
-	i := binary.BigEndian.Uint64(append(padding, bytes...))
-	return i
-}
-
-// UintToBytes converts uint64 to []byte
-func UintToBytes(i uint64, size int) []byte {
-	bytes := make([]byte, 8)
-	binary.BigEndian.PutUint64(bytes, i)
-	return bytes[8-size : 8]
-}
-
-// BytesToInt converts []byte to int64
-func BytesToInt(bytes ...byte) int64 {
-	if 0x7f < bytes[0] {
-		mask := uint64(1<<uint(len(bytes)*8-1) - 1)
-
-		bytes[0] &= 0x7f
-		i := BytesToUInt(bytes...)
-		i = (^i + 1) & mask
-		return int64(-i)
-
-	} else {
-		i := BytesToUInt(bytes...)
-		return int64(i)
-	}
-}
-
-// IntToBytes converts int to []byte
-func IntToBytes(i int, size int) []byte {
-	var ui uint64
-	if 0 < i {
-		ui = uint64(i)
-	} else {
-		ui = (^uint64(-i) + 1)
-	}
-	return UintToBytes(ui, size)
-}