[Plugin: Count per Day] How to Delete Completely ?

I have deleted this plugin Count-Per-Day a few months back using the normal WordPress delete plugin procedure, but Google Webmaster tools is still reporting many, and I mean many, “Not Found” errors.

example:
https://www.astrasuite.com/astrablog/wp-content/plugins/count-per-day/ajax.php?f=count&page=-188

Of course, there is no such folder count-per-day anymore.

Developer of Count-Per-Day, why is this so ? Is there anything else to delete ?

* Your plugin was good, but it was redundant for me as I wanted some of Jetpack’s features, which already has Site Stats.

Thanks