Doing some cleanup.

third_party/docbook-xsl-1.78.0/params/html.extra.head.links.xml

Index: third_party/docbook-xsl-1.78.0/params/html.extra.head.links.xml
diff --git a/third_party/docbook-xsl-1.78.0/params/html.extra.head.links.xml b/third_party/docbook-xsl-1.78.0/params/html.extra.head.links.xml
deleted file mode 100644
index ddc666fc8ea34591199edf11b47a5d6a40003aa4..0000000000000000000000000000000000000000
--- a/third_party/docbook-xsl-1.78.0/params/html.extra.head.links.xml
+++ /dev/null
@@ -1,31 +0,0 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
-          xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-          version="5.0" xml:id="html.extra.head.links">
-<refmeta>
-<refentrytitle>html.extra.head.links</refentrytitle>
-<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
-</refmeta>
-<refnamediv>
-<refname>html.extra.head.links</refname>
-<refpurpose>Toggle extra HTML head link information</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<src:fragment xml:id="html.extra.head.links.frag">
-<xsl:param name="html.extra.head.links" select="0"/>
-</src:fragment>
-</refsynopsisdiv>
-
-<refsection><info><title>Description</title></info>
-
-<para>If non-zero, extra <tag>link</tag> elements will be
-generated in the <tag>head</tag> of chunked HTML files. These
-extra links point to chapters, appendixes, sections, etc. as supported
-by the <quote>Site Navigation Bar</quote> in Mozilla 1.0 (as of CR1, at least).
-</para>
-
-</refsection>
-</refentry>