Details:
Removing a MySQL database
 
Overview
Since most accounts have MySQL database creation limits, it is recommended to 
remove any unnecessary MySQL databases so that you are able to create more 
databases when necessary.
Steps
1 To access the MySQL Account Maintenance Menu, see:
http://www.infoservemedia.com/support/KB/details.php?
ID=00.1.6.2.660
2 Click on  next to the name of the database you wish to delete.
Troubleshooting
 
Before deleting a database due to problems with that database, try using on the 
database to repair any problems with it.