To delete a field:
1. Navigate to Components-> .Mighty Resources-> Types in the Joomla global menu. The Content Types page appears and displays a list of existing types.
2. Click the Field link corresponding to the type whose field you want to delete. The Fields Of Type page appears.
3. Select the check box corresponding to the field you want to delete and click the Delete button  in the toolbar, as shown in the following figure:
4. Click the OK button in the confirmation message box.
The selected field is deleted.
To delete more than fields, select the check boxes corresponding to the fields, and click the Delete button in the toolbar.