Doing some cleanup.

third_party/docbook-xsl-1.78.0/params/html.ext.xml

Index: third_party/docbook-xsl-1.78.0/params/html.ext.xml
diff --git a/third_party/docbook-xsl-1.78.0/params/html.ext.xml b/third_party/docbook-xsl-1.78.0/params/html.ext.xml
deleted file mode 100644
index 8d6fd9552f657d04d0b29989f00db50f2b1407ab..0000000000000000000000000000000000000000
--- a/third_party/docbook-xsl-1.78.0/params/html.ext.xml
+++ /dev/null
@@ -1,29 +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.ext">
-<refmeta>
-<refentrytitle>html.ext</refentrytitle>
-<refmiscinfo class="other" otherclass="datatype">string</refmiscinfo>
-</refmeta>
-<refnamediv>
-<refname>html.ext</refname>
-<refpurpose>Identifies the extension of generated HTML files</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<src:fragment xml:id="html.ext.frag">
-<xsl:param name="html.ext">.html</xsl:param>
-</src:fragment>
-</refsynopsisdiv>
-
-<refsection><info><title>Description</title></info>
-
-<para>The extension identified by <parameter>html.ext</parameter> will
-be used as the filename extension for chunks created by this
-stylesheet. </para>
-
-</refsection>
-</refentry>