Remove the last couple of mentions of Pkg-Config and Glib from the book. Fixes #2952.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9647 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

prologue/why.xml

@@ -162,14 +162,6 @@
         internationalization and localization of numerous packages.</para>
       </listitem>
 
-      <listitem>
-        <para>Glib</para>
-
-        <para>This package contains low-level core library functions for things
-        such as event loops and threading.  It is used by one other LFS package,
-        Pkg-config.</para>
-      </listitem>
-
       <listitem>
         <para>Glibc</para>
 
@@ -353,14 +345,6 @@
         packages.</para>
       </listitem>
 
-      <listitem>
-        <para>Pkg-config</para>
-
-        <para>This package contains a tool for passing the include path 
-        and/or library paths to build tools during the configure and make 
-        processes.  It is needed by many LFS packages.</para>
-      </listitem>
-
       <listitem>
         <para>Procps</para>