fix(stdlib): Buffer.toBytes should not expose the raw instance of Byt…

…es used by the buffer (#1130)

stdlib/buffer.gr

@@ -191,12 +191,7 @@ export let truncate = (length, buffer) => {
  * @since v0.4.0
  */
 export let toBytes = buffer => {
- let len = Bytes.length(buffer.data)
- if (buffer.len == len) {
- buffer.data
- } else {
- Bytes.slice(0, buffer.len, buffer.data)
- }
+ Bytes.slice(0, buffer.len, buffer.data)
 }
 
 /**