python: Remove --with-system-ffi

This option is removed by upstream in 3.12.

Link: https://github.com/python/cpython/pull/100544

chapter08/python.xml

@@ -48,7 +48,6 @@
 <screen><userinput remap="configure">./configure --prefix=/usr        \
             --enable-shared      \
             --with-system-expat  \
-            --with-system-ffi    \
             --enable-optimizations</userinput></screen>
 
     <variablelist>
@@ -62,14 +61,6 @@
        </listitem>
      </varlistentry>
 
-    <varlistentry>
-      <term><parameter>--with-system-ffi</parameter></term>
-      <listitem>
-        <para>This switch enables linking against the system version of
-        <filename class='libraryfile'>libffi.so</filename>.</para>
-      </listitem>
-    </varlistentry>
-
     <varlistentry>
       <term><parameter>--enable-optimizations</parameter></term>
       <listitem>