Go to Setting --> Users --> Set Remove Studio Fields as Administrator.

Enable debug mode.Technical -> Database Structure -> Remove Studio Fields to access the new wizard.

Select the fields which is needed to be deleted and click on Remove Fields button.
Note* Once you delete a field, you will lose the data stored with that field. So, ensure that you don't need the data anymore. Else, backup or store the data before deleting the fields.

If we delete the fields which are added in any view, we cannot access those views. So, we have to remove the fields from the view before deleting. This module makes this step easier. It checks the views first and return the list of fields and the views in which the fields are used. Then, we can either open the corresponding view through Studio, select the field in the view, and click on the button 'REMOVE FROM VIEW', or we can navigate to Settings/ Technical/ User Interface/ Views, search for the view and edit the XML code to remove the field from the view.

If we don't have the fields in any views or if we already removed the fields from the views, then a notification will be displayed after deleting the fields.