[system-administrators-guide] Removing DHCP chapter and the reference to it from the Preface Its now covered by the Networking Gui

[stephenw]

commit 0e92dfe4ac70c7b4f635d17acf64cf32d6d484be
Author: Stephen Wadeley 
Date:   Mon Feb 10 23:57:50 2014 +0100

Removing DHCP chapter and the reference to it from the Preface
    Its now covered by the Networking Guide

en-US/DHCP_Servers.xml |  617 ------------------------------------------------
 en-US/Preface.xml      |    3 -
 2 files changed, 0 insertions(+), 620 deletions(-)
---
diff --git a/en-US/Preface.xml b/en-US/Preface.xml
index 3122f30..a5c8b32 100644
--- a/en-US/Preface.xml
+++ b/en-US/Preface.xml
@@ -100,9 +100,6 @@
             This part discusses various topics related to servers such as how to set up a Web server or share files and directories over the network.
           </para>
           <para>
-            <xref linkend="ch-DHCP_Servers" /> guides you through the installation of a Dynamic Host Configuration Protocol (DHCP) server and client. Read this chapter if you need to configure DHCP on your system.
-          </para>
-          <para>
             <xref linkend="ch-Web_Servers" /> focuses on the <application>Apache HTTP Server 2.2</application>, a robust, full-featured open source web server developed by the Apache Software Foundation. Read this chapter if you need to configure a web server on your system.
           </para>
           <para>