Update 'check' rationale.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11689 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

prologue/why.xml

@@ -95,8 +95,7 @@
       <listitem>
         <para>Check</para>
 
-        <para>This package contains a test harness for other programs.
-        It is only installed in the temporary toolchain.</para>
+        <para>This package contains a test harness for other programs.</para>
       </listitem>
 
       <listitem>