attempting to fix travis-ci error

https://travis-ci.org/misterbisson/bcms/jobs/39534642

> bCMS_Search_Test::test_reindex
> mysql_get_server_info(): Access denied for user ''@'localhost' (using password: NO)
> /home/travis/build/misterbisson/bcms/components/class-bcms-search.php:75

I'm removing the call to mysql_get_server_info(), since WP now requires 5.x and the test was for 4.1 or below.