[system-administrators-guide] Remove: Configuring Authentication

[stephenw]

commit 2ba9bab32d3890f175d41b0b10bf487a5e102b9c
Author: Stephen Wadeley <swadeley at redhat.com>
Date:   Tue Dec 9 19:58:28 2014 +0100

    Remove: Configuring Authentication
    
    its an obsolete chapter

 en-US/Configuring_Authentication.xml  | 3544 ---------------------------------
 en-US/Preface.xml                     |    3 -
 en-US/System_Administrators_Guide.xml |    1 -
 3 files changed, 0 insertions(+), 3548 deletions(-)
---
diff --git a/en-US/Preface.xml b/en-US/Preface.xml
index 04e67d8..c1dc273 100644
--- a/en-US/Preface.xml
+++ b/en-US/Preface.xml
@@ -78,9 +78,6 @@
             <xref linkend="ch-Services_and_Daemons" /> covers the configuration of the services to be run when a system is started, and provides information on how to start, stop, and restart the services on the command line using the <command>systemctl</command> utility. 
           </para>
           <para>
-            <xref linkend="ch-Configuring_Authentication" /> describes how to configure user information retrieval from Lightweight Directory Access Protocol (LDAP), Network Information Service (NIS), and Winbind user account databases, and provides an introduction to the System Security Services Daemon (SSSD). Read this chapter if you need to configure authentication on your system.
-          </para>
-          <para>
             <xref linkend="ch-OpenSSH" /> describes how to enable a remote login via the SSH protocol. It covers the configuration of the <systemitem class="service">sshd</systemitem> service, as well as a basic usage of the <command>ssh</command>, <command>scp</command>, <command>sftp</command> client utilities. Read this chapter if you need a remote access to a machine.
           </para>
         </listitem>
diff --git a/en-US/System_Administrators_Guide.xml b/en-US/System_Administrators_Guide.xml
index 1abcce6..3258ad7 100644
--- a/en-US/System_Administrators_Guide.xml
+++ b/en-US/System_Administrators_Guide.xml
@@ -37,7 +37,6 @@
       </para>
     </partintro>
     <xi:include href="Services_and_Daemons.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
-    <xi:include href="Configuring_Authentication.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
     <xi:include href="OpenSSH.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
   </part>
   <part id="part-Servers">