All Composer commands used in CI should use `--no-interaction` to prevent them hanging in case interaction is expected. However, as setupPHP sets the `COMPOSER_NO_INTERACTION` flag (as of this version), this is not needed when using setupPHP.
This removes redundant `--no-interaction` arguments from the example code.
Also see: https://blog.packagist.com/composer-2-2/#more-secure-plugin-execution
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