Remove XNAL topics from arch spec oasis-tcs/dita#898

specification/archSpec/archSpec-technicalContent.ditamap

@@ -6,8 +6,5 @@
     <!--<topicref href="technicalContent/dita_technicalContent_TopicDomains.dita"/>-->
     <topicref href="technicalContent/mathML-and-equation-domains.dita"/>
     <topicref href="technicalContent/releaseManagement-domain.dita"/>
-    <topicref href="technicalContent/xNALDomain.dita">
-      <topicref href="technicalContent/xnaldetails.dita"/>
-    </topicref>
   </topicref>
 </map>

specification/archSpec/technicalContent/technical-content-domains.dita

@@ -3,8 +3,8 @@
 <concept xml:lang="en-us" id="technical-content-domains">
  <title>Domain specializations</title>
  <shortdesc>This section contains information about the technical content domains, including a
-    general overview and more specific information about the xNAL, release management, equation, and
+    general overview and more specific information about the release management, equation, and
     MathML domains.<draft-comment author="robander" time="25 may 2021" audience="spec-editors"
-      >Should this be more comprehensive, and not just limited to those three or four domains? Or
-      are the others like "software" too obvious to require a topic?</draft-comment></shortdesc>
+      >Should this be more comprehensive, and not just limited to those domains? Or are the others
+      like "software" too obvious to require a topic?</draft-comment></shortdesc>
 </concept>