You can delete
custom MIME types at any time. However, you can not delete system-wide
MIME types - please contact your hosting administrator if you have
a problem with one of these.
To delete
a MIME type:
Click on
the MIME Types button on the home page.
A list of
customized MIME types is displayed underneath the User
Defined MIME Types area. Enter the details of one of
these in the MIME Type and Extension(s)
fields.