chore(internal): remove duplicate safe & unsafe

command.go

@@ -104,7 +104,7 @@ func cmdString(cmd Cmder, val interface{}) string {
 		b = internal.AppendArg(b, val)
 	}
 
-	return internal.String(b)
+	return util.BytesToString(b)
 }
 
 //------------------------------------------------------------------------------

internal/arg.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"strconv"
 	"time"
+
+	"github.com/go-redis/redis/v9/internal/util"
 )
 
 func AppendArg(b []byte, v interface{}) []byte {
@@ -11,7 +13,7 @@ func AppendArg(b []byte, v interface{}) []byte {
 	case nil:
 		return append(b, "<nil>"...)
 	case string:
-		return appendUTF8String(b, Bytes(v))
+		return appendUTF8String(b, util.StringToBytes(v))
 	case []byte:
 		return appendUTF8String(b, v)
 	case int:

internal/safe.go

@@ -1,12 +0,0 @@
-//go:build appengine
-// +build appengine
-
-package internal
-
-func String(b []byte) string {
-	return string(b)
-}
-
-func Bytes(s string) []byte {
-	return []byte(s)
-}

internal/unsafe.go

@@ -1,21 +0,0 @@
-//go:build !appengine
-// +build !appengine
-
-package internal
-
-import "unsafe"
-
-// String converts byte slice to string.
-func String(b []byte) string {
-	return *(*string)(unsafe.Pointer(&b))
-}
-
-// Bytes converts string to byte slice.
-func Bytes(s string) []byte {
-	return *(*[]byte)(unsafe.Pointer(
-		&struct {
-			string
-			Cap int
-		}{s, len(s)},
-	))
-}