USE_XLIB has been obsolete for some time.

Submitted by:	ak
Approved by:	bcr (mentor)

en_US.ISO8859-1/books/porters-handbook/book.xml

@@ -2075,10 +2075,7 @@ PORTEPOCH=	1</programlisting>
 		  directly supports the window system.  Do not put
 		  regular X applications here; most of them should go
 		  into other <filename>x11-*</filename> categories
-		  (see below).  If your port <emphasis>is</emphasis>
-		  an X application, define <makevar>USE_XLIB</makevar>
-		  (implied by <makevar>USE_IMAKE</makevar>) and put it
-		  in the appropriate category.</entry>
+		  (see below).</entry>
 	      </row>
 
 	      <row>
@@ -6137,24 +6134,11 @@ PLIST_SUB+=		NLS="@comment "
 USE_GL=		glu</programlisting>
 	</example>
 
-	<para>Some ports define <makevar>USE_XLIB</makevar>, which
-	  makes the port depend on all the 50 or so libraries.  This
-	  variable exists for backwards compatibility, as it predates
-	  modular X.Org, and should not be used on new ports.</para>
-
 	<table frame="none">
 	  <title>Variables for Ports That Use X</title>
 
 	  <tgroup cols="2">
 	    <tbody>
-	      <row>
-		<entry><makevar>USE_XLIB</makevar></entry>
-		<entry>The port uses the X libraries.  Deprecated -
-		  use a list of X.Org components in
-		  <makevar>USE_XORG</makevar> variable
-		  instead.</entry>
-	      </row>
-
 	      <row>
 		<entry><makevar>USE_IMAKE</makevar></entry>
 		<entry>The port uses <command>imake</command>.</entry>