Remove nginx 1.12.2.
Remove nginx 1.12.2.

[#156851318]

Signed-off-by: Leah Hanson <59915d4d5a651c1df4fd522b917423b47c84f68b@pivotal.io>

cf-identity/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack