EXM-55856 Reoved invalid reference

Author: octavian_nadolu

oxygen_xml_blog.ditamap

@@ -45,7 +45,6 @@
     <topichead navtitle="Development">
         <topicref href="topics/transform_text_files.dita"/>
         <topicref href="topics/editing_complex_xml_schemas.dita"/>
-        <topicref href="topics/json_transfrom.dita"/>
     </topichead>
     <topichead navtitle="Miscellaneous">
         <topicref href="topics/ISO-27001-certification-announcement.dita"/>