Doing some cleanup.

third_party/docbook-xsl-1.78.0/html/keywords.xsl

Index: third_party/docbook-xsl-1.78.0/html/keywords.xsl
diff --git a/third_party/docbook-xsl-1.78.0/html/keywords.xsl b/third_party/docbook-xsl-1.78.0/html/keywords.xsl
deleted file mode 100644
index c12e39fc936d23d6e280b743d3592fe049358e48..0000000000000000000000000000000000000000
--- a/third_party/docbook-xsl-1.78.0/html/keywords.xsl
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version='1.0'?>
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-                version='1.0'>
-
-<!-- ********************************************************************
-     $Id: keywords.xsl 6910 2007-06-28 23:23:30Z xmldoc $
-     ********************************************************************
-
-     This file is part of the XSL DocBook Stylesheet distribution.
-     See ../README or http://docbook.sf.net/release/xsl/current/ for
-     copyright and other information.
-
-     ******************************************************************** -->
-
-<xsl:template match="keywordset"></xsl:template>
-<xsl:template match="subjectset"></xsl:template>
-
-<!-- ==================================================================== -->
-
-<xsl:template match="keywordset" mode="html.header">
-  <meta name="keywords">
-    <xsl:attribute name="content">
-      <xsl:apply-templates select="keyword" mode="html.header"/>
-    </xsl:attribute>
-  </meta>
-</xsl:template>
-
-<xsl:template match="keyword" mode="html.header">
-  <xsl:apply-templates/>
-  <xsl:if test="following-sibling::keyword">, </xsl:if>
-</xsl:template>
-
-<!-- ==================================================================== -->
-
-</xsl:stylesheet>