We currently have `replace` directives for various `symfony/polyfill-php` to stop them being included in #mediawiki-vendor...
Tracking various tasks that need completing so that we can eventually fully remove those entries from `composer.json` because they should not be needed at all as we are running PHP8.1.
```lang=json
"symfony/polyfill-php73": "1.99",
"symfony/polyfill-php74": "1.99",
"symfony/polyfill-php80": "1.99",
"symfony/polyfill-php81": "1.99",
```
These were added (though the 74 was technically not needed) for {T373753}.
---
```
reedy@ubuntu64-web-esxi:/var/www/wiki/mediawiki/vendor$ php8.1 `which composer` why symfony/polyfill-php73
__root__ dev-master replaces symfony/polyfill-php73 (1.99)
ruflin/elastica 7.3.1 requires symfony/polyfill-php73 (^1.19)
reedy@ubuntu64-web-esxi:/var/www/wiki/mediawiki/vendor$ php8.1 `which composer` why symfony/polyfill-php80
__root__ dev-master replaces symfony/polyfill-php80 (1.99)
data-values/geo 4.5.1 requires symfony/polyfill-php80 (^1.18.1)
wikimedia/parsoid v0.22.0-a6 requires symfony/polyfill-php80 (^1.23.1)
reedy@ubuntu64-web-esxi:/var/www/wiki/mediawiki/vendor$ php8.1 `which composer` why symfony/polyfill-php81
__root__ dev-master replaces symfony/polyfill-php81 (1.99)
wikimedia/json-codec v3.0.3 requires symfony/polyfill-php81 (^1.27.0)
```