Removed mention of old Udev package from Rationale page

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10614 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

prologue/why.xml

@@ -516,14 +516,6 @@
         procedures of many LFS packages.</para>
       </listitem>
 
-      <listitem>
-        <para>Udev</para>
-
-        <para>This package contains programs for dynamic creation of
-        device nodes.  It is an alternative to creating thousands of
-        static devices in the /dev directory.</para>
-      </listitem>
-
       <listitem>
         <para>Util-linux</para>