To Remove a Single Field From {all_fields}

/**

 * Remove Specific Fields from Notifications

 *

 * @link https://wpforms.com/developers/how-to-remove-specific-fields-from-notifications

 */

add_action('wpforms_loaded', function() {

    add_filter('wpforms_entry_email_data', function ($fields, $entry, $form_data) {

        // Bail early if form ID is not equal to 1000

        if ((int)$form_data['id'] !== 1000) {

            return $fields;

        }

        // Unset field from notifications with field ID #3

        if (isset($fields[3])) {

            unset($fields[3]);

        }

        return $fields;

    }, 11, 3);

});