dbus: remove --with-console-auth-dir

BLFS no longer contains ConsoleKit, and ConsoleKit can be considered
dead now (the ConsoleKit2 fork has no action in the recent year).

In BLFS systemd (with PAM) or elogind provide a similar functionality.

I can see no reason to mention ConsoleKit in the book now.

chapter08/dbus.xml

@@ -56,20 +56,11 @@
             --disable-doxygen-docs               \
             --disable-xml-docs                   \
             --docdir=/usr/share/doc/dbus-&dbus-version; \
-            --with-console-auth-dir=/run/console \
             --with-system-socket=/run/dbus/system_bus_socket</userinput></screen>
 
     <variablelist>
       <title>The meaning of the configure options:</title>
 
-      <varlistentry>
-        <term><parameter>--with-console-auth-dir=/run/console</parameter></term>
-        <listitem>
-          <para>This specifies the location of the ConsoleKit authorization
-          directory.</para>
-        </listitem>
-      </varlistentry>
-
       <varlistentry>
         <term>
           <parameter>--runstatedir=/run</parameter> and