message: Simplify a call to append.
  GitOrigin-RevId:
diff: @@ -72,8 +72,7 @@ func (v *verifierSet) Verify(signature, data []byte) error {
  for i := 0; i < len(entries); i++ {
  var signedData []byte
  if entries[i].PrefixType == tinkpb.OutputPrefixType_LEGACY {
  - signedData = append(signedData, data...)
  - signedData = append(signedData, cryptofmt.LegacyStartByte)
  + signedData = append(data, cryptofmt.LegacyStartByte)
  } else {
  signedData = data
  }
  