You can delete any 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 link in the Domain Menu area.
A list of customized MIME types is displayed underneath the Delete MIME types area. Choose one of these from the drop-down list.
Click on the Delete button. Click on the MIME types link to return to the MIME types window to confirm that it has been deleted.