PHP 8.4 | Example code: remove use of E_STRICT

The `E_STRICT` constant is deprecated as of PHP 8.4 and will be removed in PHP 9.0 (commit went in today).

The error level hasn't been in use since PHP 8.0 anyway and was only barely still used in PHP 7.x, so removing the exclusion from the `error_reporting()` setting in the example code shouldn't really make any difference in practice.

Ref:
* https://wiki.php.net/rfc/deprecations_php_8_4#remove_e_strict_error_level_and_deprecate_e_strict_constant

examples/common.php

@@ -4,7 +4,7 @@
 	die('Must run from command line');
 }
 
-error_reporting(E_ALL | E_STRICT);
+error_reporting(E_ALL);
 ini_set('display_errors', 1);
 ini_set('log_errors', 0);
 ini_set('html_errors', 0);