DROP TABLE removes one or more tables. DROP DATABASE drops all tables in the database and deletes the database. But, as the MySQL manual warns "Be very careful with this statement!" because you are going to lose everything in the database if you do!
You probably just want to DROP TABLE by the looks of your request.
In phpMyAdmin it's pretty easy to do things like this. I.e. to drop a table select the database in the drop-down menu on the left. Then click on the table name you want to drop on the left. Then on the top right one of the tabs is "Drop".