def remove_accessibility_type(self, accessibility_type=None):
self._payload.remove_accessibility_type(accessibility_type)<EOL>
Removes an accessibility type.

        arg:    accessibility_type (osid.type.Type): accessibility type
                to remove
        raise:  NoAccess - ``Metadata.isReadOnly()`` is ``true``
        raise:  NotFound - acessibility type not found
        raise:  NullArgument - ``accessibility_type`` is ``null``
        *compliance: mandatory -- This method must be implemented.*