Drop ISBN for versions where it do not make sense.

diff --git a/freeculture.xml b/freeculture.xml
index b78c90db6a943837233ee1d7c7f4c973fd5b0144..0a15a157743777544fd3106ea7d79400acf33c6a 100644 (file)
--- a/freeculture.xml
+++ b/freeculture.xml
@@ -15714,27 +15714,15 @@ references.  The source files for this book are available from
  <entry>Paper copy from XXX</entry>
  </row>
  <row>
- <entry>N/A</entry>
- <entry>text/plain</entry>
- </row>
- <row>
  <entry>978-82-92812-XX-Y</entry>
  <entry>application/pdf</entry>
  </row>
  <row>
- <entry>N/A</entry>
- <entry>text/html</entry>
- </row>
- <row>
  <entry>978-82-92812-XX-Y</entry>
  <entry>application/epub+zip</entry>
  </row>
  <row>
  <entry>978-82-92812-XX-Y</entry>
- <entry>application/docbook+xml</entry>
- </row>
- <row>
- <entry>978-82-92812-XX-Y</entry>
  <entry>application/x-mobipocket-ebook</entry>
  </row>
 </tbody>