Remove mention of cflinuxfs2 [#164374199]

Author: Paige

trusted-system-certificates.html.md.erb

@@ -4,10 +4,10 @@ title: Configuring Trusted System Certificates for Applications
 
 The following mechanisms exist to provide trusted certificates to applications running on Cloud Foundry:
 
-- For the `cflinuxfs3` or `cflinuxfs2` stack, you can install the trusted certificates
+- For the `cflinuxfs3` stack, you can install the trusted certificates
 directly into the system trust store at `/etc/ssl/certs`. In the deployment manifest, set
-the `cflinuxfs3-rootfs.trusted_certs` or `cflinuxfs2-rootfs.trusted_certs` property of the stack release's
-`cflinuxfs3-rootfs-setup` or `cflinuxfs2-rootfs-setup` job to the concatenated values of the PEM-encoded CA
+the `cflinuxfs3-rootfs.trusted_certs` property of the stack release's
+`cflinuxfs3-rootfs-setup` job to the concatenated values of the PEM-encoded CA
 certificates. 
 <br><br>
 For example: