Complex sentence: In 2012, CGI had its $46.2-million contract to build an electronic diabetes registry for eHealth Ontario formally cancelled after it failed to meet deadlines imposed by eHealth and was eventually declared obsolete and overtaken by newer technology developed by other contractors.
Split into simpler sentences: In 2012, CGI had its $46.2-million contract to build an electronic diabetes registry for eHealth Ontario formally cancelled after it failed to meet deadlines imposed by eHealth. The work that CGI did was eventually declared obsolete, and it was overtaken by newer technology developed by other contractors.