Doing some cleanup.

third_party/docbook-xsl-1.78.0/params/passivetex.extensions.xml

Index: third_party/docbook-xsl-1.78.0/params/passivetex.extensions.xml
diff --git a/third_party/docbook-xsl-1.78.0/params/passivetex.extensions.xml b/third_party/docbook-xsl-1.78.0/params/passivetex.extensions.xml
deleted file mode 100644
index 36f5977cc0010bdd9405e06189a35da9067cb026..0000000000000000000000000000000000000000
--- a/third_party/docbook-xsl-1.78.0/params/passivetex.extensions.xml
+++ /dev/null
@@ -1,30 +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="passivetex.extensions">
-<refmeta>
-<refentrytitle>passivetex.extensions</refentrytitle>
-<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
-</refmeta>
-<refnamediv>
-<refname>passivetex.extensions</refname>
-<refpurpose>Enable PassiveTeX extensions?</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-<src:fragment xml:id="passivetex.extensions.frag"><xsl:param name="passivetex.extensions" select="0"/></src:fragment>
-</refsynopsisdiv>
-
-<refsection><info><title>Description</title></info>
-
-<important><para>The PassiveTeX XSL-FO processor is
-no longer supported by DocBook XSL, beginning with version 1.78.</para></important>
-
-<para>PassiveTeX was never a complete implementation of
-XSL-FO, and development has ceased. Setting this parameter will
-have no effect on the output.</para>
-
-</refsection>
-</refentry>