Remove comments about WebAC (#1555)

* Remove comments about WebAC

WebAC is not used but is listed as a feature added when using Fedora. Although it is there, I'd suggest leaving off of this documentation.

* Update user-intro.md

docs/user-documentation/user-intro.md

@@ -36,7 +36,7 @@ Even though Fedora is optional in Islandora 8, most repositories will use it sin
 * Memento versioning
 * integration with RDF/Linked Data triplestores
 * Integration with Microservices via API-X
-* WebAC Policies for access control
+* WebAC Policies for access control (not currently leveraged by default)
 
 In Islandora repositories that use Fedora, all properties about Drupal nodes are mirrored in Fedora as RDF properties. But, even if an Islandora instance does not use Fedora, Drupal can provide an object's properties as RDF (again, Drupal is the primary source of data in Islandora 8). In addition, the Drupal media associated with Islandora 8 objects are persisted to Fedora, although exactly which media is configurable within the Islandora 8 admin interface. Just as Drupal out of the box has a public and private filesystem, Islandora adds a third filesystem to Drupal called, not surprisingly, "fedora", and it is to this filesystem that media are persisted. We will provide more information about Fedora's role in an Islandora 8 repository in the [metadata](metadata.md) and [media](media.md) sections.