Comments preceding stylesheet declaration no longer processed

The original intent of processing this was to try to generate useful
documentation for any source.  Now, this project is moving more toward
expecting that the user make use of its literate features.

src/texinfo.xsl

@@ -34,14 +34,13 @@
 <!--
   Entry point
 
-  Comments that precede the stylesheet definition will also be
-  processed, since these are commonly used to describe the stylesheet
-  as a whole.
+  Any comments preceding the root node will not be output; it is
+  assumed that a license/copyright header will be placed here, or text
+  describing the stylesheet.
 -->
 <template match="xsl:stylesheet|xsl:transform">
   <apply-templates mode="xt:doc-gen"
-                   select="preceding-sibling::comment()
-                           |node()" />
+                   select="node()" />
 </template>