Minor edit.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@8915 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter04/aboutlfs.xml

@@ -11,7 +11,7 @@
   <title>About $LFS</title>
 
   <para>Throughout this book, the environment variable <envar>LFS</envar> will
-  be used several times. It is paramount that this variable is always defined.
+  be used. It is paramount that this variable is always defined.
   It should be set to the mount point chosen for the LFS partition.
   Check that the <envar>LFS</envar> variable is set up properly with:</para>