How do I resolve missing content type references from uninstalled modules? In my previous setup of my site, I installed a bunch of modules and had them uninstalled. But now I have many orphaned or missing content types that still resides in the database somewhere. Below is what is displayed on the Field list page where its trying to reference these non-existent content types. Is there a place where I can go to clean this up? Which tables would I be looking into? And if I were to delete these entries where else would I have to delete it?
this probably is happening because you've deleted the module from sites/all/modules before uninstalling it correctly via drupal / or the module you have installed did not provided the code to uninstall it from database. Based in this, you can try to install the module again and then, disable it first, then uninstall it, and then delete it from the sites/all/modules. And don't forget to clear the cache

If the problem persist, i think you can always delet the tables individually from phpmyadmin.
Let me know if the problem persists. So, then i can analyze it with you