Doing some cleanup.

third_party/docbook-xsl-1.78.0/params/navig.showtitles.xml

Index: third_party/docbook-xsl-1.78.0/params/navig.showtitles.xml
diff --git a/third_party/docbook-xsl-1.78.0/params/navig.showtitles.xml b/third_party/docbook-xsl-1.78.0/params/navig.showtitles.xml
deleted file mode 100644
index a4eb3ff4783be68126dbec88d3b471370055dba1..0000000000000000000000000000000000000000
--- a/third_party/docbook-xsl-1.78.0/params/navig.showtitles.xml
+++ /dev/null
@@ -1,32 +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="navig.showtitles">
-<refmeta>
-<refentrytitle>navig.showtitles</refentrytitle>
-<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
-</refmeta>
-<refnamediv>
-<refname>navig.showtitles</refname>
-<refpurpose>Display titles in HTML headers and footers?</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<src:fragment xml:id="navig.showtitles.frag"><xsl:param name="navig.showtitles">1</xsl:param></src:fragment>
-</refsynopsisdiv>
-
-<refsection><info><title>Description</title></info>
-
-<para>If non-zero,
-the headers and footers of chunked HTML
-display the titles of the next and previous chunks,
-along with the words 'Next' and 'Previous' (or the
-equivalent graphical icons if navig.graphics is true).
-If false (zero), then only the words 'Next' and 'Previous'
-(or the icons) are displayed.
-</para>
-
-</refsection>
-</refentry>