build(autoloader): Remove noisy changes when regenerating

[provokateurin]

Summary

When executing the script all the app/*/composer/composer/installed.php files change as they reference the current HEAD commit hash. To avoid having to manually discard the changes, just drop them automatically.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[artonge]

Is there no option to prevent those updates in the first place?
Approved, as fine with this solution thought.

[susnux]

Is there no option to prevent those updates in the first place?

Skip the composer install ... part and only run composer dump-autoload ....

[provokateurin]

Skip the composer install ... part and only run composer dump-autoload ....

I wonder if not doing it could cause any problems. I don't see why we need to do it first before dumping the autoloaders, so we might just get rid of it in the first place?