i contacted Yahoo! support. they cleared out the database, its all good now. thanks for all your help!
there is no option to remove MySQL anywhere in the Yahoo! admin panel. I clicked through every link, even non related to be sure, and searched their help
On Yoahoo Web Hosting Management they have an automated installer for wordpress, all I had to do was create a username and password and it set itself up.
i deleted everything, all files in all directories on the server.
