Link?
Link?
There is still a link to the old site in https://www.chess.ca/en/ws/under-construction/
So the new site still intentionally (contrary to your prior claim that all links were removed and that you verified this in your source) links to the old site, and you don't understand why the appeal of the badware listing due to that link failed?
(How much info is in the old server? Is it possible to put the old server behind a proxy that rewrite all the pages and remove the malware or whatever is the problem? Perhaps remove all the links to external sites and to executable files or something like that. I'm 80% sure this is a bad idea, but perhaps it is possible with enough technical knowledge.)
There is still a lot of info on the old website. When we decided to go with an "emergency" rewrite of our website, instead of trying to cleanse Drupal, we rewrote only the core functions needed to run tournaments. To keep users from complaining, I kept old.chess.ca available. Now, they'll just have to wait. I do not want to risk anything that might provoke the Google monster into banishing the new website again.