remove error handler not needed on PHP 8

Author: xabbuh

src/Symfony/Component/String/AbstractString.php

@@ -507,23 +507,14 @@ public function toByteString(string $toEncoding = null): ByteString
  return $b;
  }
 
- set_error_handler(static fn ($t, $m) => throw new InvalidArgumentException($m));
-
  try {
- try {
- $b->string = mb_convert_encoding($this->string, $toEncoding, 'UTF-8');
- } catch (InvalidArgumentException|\ValueError $e) {
- if (!\function_exists('iconv')) {
- if ($e instanceof \ValueError) {
- throw new InvalidArgumentException($e->getMessage(), $e->getCode(), $e);
- }
- throw $e;
- }
-
- $b->string = iconv('UTF-8', $toEncoding, $this->string);
+ $b->string = mb_convert_encoding($this->string, $toEncoding, 'UTF-8');
+ } catch (\ValueError $e) {
+ if (!\function_exists('iconv')) {
+ throw new InvalidArgumentException($e->getMessage(), $e->getCode(), $e);
  }
- } finally {
- restore_error_handler();
+
+ $b->string = iconv('UTF-8', $toEncoding, $this->string);
  }
 
  return $b;