Doing some cleanup.

third_party/docbook-xsl-1.78.0/params/user.css.xml

Index: third_party/docbook-xsl-1.78.0/params/user.css.xml
diff --git a/third_party/docbook-xsl-1.78.0/params/user.css.xml b/third_party/docbook-xsl-1.78.0/params/user.css.xml
deleted file mode 100644
index e58254f2edb36e5940a1ebc87fa312abf28a53a6..0000000000000000000000000000000000000000
--- a/third_party/docbook-xsl-1.78.0/params/user.css.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="user.css">
-<refmeta>
-<refentrytitle>user.css</refentrytitle>
-<refmiscinfo class="other" otherclass="datatype">filename</refmiscinfo>
-</refmeta>
-<refnamediv>
-<refname>user.css</refname>
-<refpurpose>Specifies the path to user-supplied CSS</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-  <src:fragment xml:id="user.css.frag">
-    <xsl:param name="user.css">user.css</xsl:param>
-  </src:fragment>
-</refsynopsisdiv>
-
-<refsection><info><title>Description</title></info>
-
-<para>This parameter specifies the path from where the
-  CSS styling is read.  This file can be used to
-  add additional styling to the slides.</para>
-
-</refsection>
-</refentry>