Removed `@mixin Builder` comment from Model.php #2219

Job	Run time
PHP 8.1 Laravel 10.* MongoDB 4.4	48s
PHP 8.2 Laravel 10.* MongoDB 4.4	58s
PHP 8.2 Laravel 11.* MongoDB 4.4	59s
PHP 8.3 Laravel 10.* MongoDB 4.4	1m 2s
PHP 8.3 Laravel 11.* MongoDB 4.4	49s
PHP 8.1 Laravel 10.* MongoDB 5.0 low-deps	1m 2s
PHP 8.2 Laravel 10.* MongoDB 5.0	55s
PHP 8.2 Laravel 11.* MongoDB 5.0	1m 4s
PHP 8.3 Laravel 10.* MongoDB 5.0	54s
PHP 8.3 Laravel 11.* MongoDB 5.0	54s
PHP 8.1 Laravel 10.* MongoDB 6.0	54s
PHP 8.2 Laravel 10.* MongoDB 6.0	1m 6s
PHP 8.2 Laravel 11.* MongoDB 6.0	1m 4s
PHP 8.3 Laravel 10.* MongoDB 6.0	1m 0s
PHP 8.3 Laravel 11.* MongoDB 6.0	57s
PHP 8.1 Laravel 10.* MongoDB 7.0	1m 7s
PHP 8.2 Laravel 10.* MongoDB 7.0	1m 5s
PHP 8.2 Laravel 11.* MongoDB 7.0	57s
PHP 8.3 Laravel 10.* MongoDB 7.0	58s
PHP 8.3 Laravel 11.* MongoDB 7.0	1m 2s
PHP 8.4 Laravel 11.* MongoDB 7.0 ignore-php-req	53s
	20m 28s

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