update: remove submit-delete-class attribute

source/import_documentation/Components/Solid-Delete.rst

@@ -40,9 +40,6 @@ Attributes
    Add this attribute to create a dialog box linked with the button of the solid-delete.
    Its value matches the message displayed in the dialog box.
 
-``class-delete-button``
-~~~~~~~~~~~~~~~~~~~~~~~
-   Define the ``class`` of the ``div`` containing the delete button.
 
 Events
 -------

source/import_documentation/attributes-list.rst

@@ -26,10 +26,6 @@ List of attributes (core framework)
 ~~~~~~~~~~~~~~~~~
    * :ref:`widget-mixin <class-field>`
 
-``class-delete-button``
-~~~~~~~~~~~~~~~~~~~~~~~
-   * :ref:`solid-delete <solid-delete>`
-
 ``class-submit-button``
 ~~~~~~~~~~~~~~~~~~~~~~~
    * :ref:`solid-form <class-submit-button-sf>`