Removes test reference to cflinuxfs2
Removes test reference to cflinuxfs2

- this was originally removed in 4bcf714f8fd3e552ff567ab8f9e3574ad5516b4a,
  but was reverted, and so needs to be recreated here.

[#168984288]

cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack