chore(php8): drop deprecated INI settings in PHP 8.5 #0000

We include a php.ini-production file, with sane defaults for all Docker
images offered here.

In PHP 8.5, these two INI directives are deprecated:

 - [`report_memleaks`](https://php.watch/codex/report_memleaks#changes-php-8.5):
   This directive has no effect on regular releases, certainly not on any
   of the official PHP Docker images, and is only effective on PHP\
   debug builds.
 - [`disable_classes`](https://php.watch/codex/disable_classes#changes-php-8.5):
   The `php.ini` in this repo contains the same values as defaults
   (empty list of classes to disable), so we can safely drop references
   to them.

This PR suggests to remove them, to avoid triggering static analyzers
unnecessarily.

Author: Ayesh

php.ini-production

@@ -16,7 +16,6 @@ implicit_flush = Off
 unserialize_callback_func =
 serialize_precision = 17
 disable_functions =
-disable_classes =
 
 zend.enable_gc = On
 
@@ -46,7 +45,6 @@ log_errors = On
 log_errors_max_len = 1024
 ignore_repeated_errors = Off
 ignore_repeated_source = Off
-report_memleaks = On
 track_errors = Off
 html_errors = On