There's no uninstall routine like in Windows. Just putting the application into the trash works well enough.
But I use
AppCleaner to find all these little configuration, library files and whatnot. They're usually rather small and shouldn't get in the way, but I like it tidy.
Just drop the application you want to remove into it and you can delete it, and everything associated with it, in one go. Has served me well for years.
/edit: oh, since you deleted the application already the cleaner won't be of much use. But next time, maybe.