RemovePermission.
        Removes the specified permissions on a security token for a user or group.
        :param str security_namespace_id: Security namespace identifier.
        :param str descriptor: Identity descriptor of the user to remove permissions for.
        :param int permissions: Permissions to remove.
        :param str token: Security token to remove permissions for.
        :rtype: :class:`<AccessControlEntry> <azure.devops.v5_0.security.models.AccessControlEntry>`

def remove_permission(self, security_namespace_id, descriptor, permissions=None, token=None):
        """RemovePermission.
        Removes the specified permissions on a security token for a user or group.
        :param str security_namespace_id: Security namespace identifier.
        :param str descriptor: Identity descriptor of the user to remove permissions for.
        :param int permissions: Permissions to remove.
        :param str token: Security token to remove permissions for.
        :rtype: :class:`<AccessControlEntry> <azure.devops.v5_0.security.models.AccessControlEntry>`
        """
        route_values = {}
        if security_namespace_id is not None:
            route_values['securityNamespaceId'] = self._serialize.url('security_namespace_id', security_namespace_id, 'str')
        if permissions is not None:
            route_values['permissions'] = self._serialize.url('permissions', permissions, 'int')
        query_parameters = {}
        if descriptor is not None:
            query_parameters['descriptor'] = self._serialize.query('descriptor', descriptor, 'str')
        if token is not None:
            query_parameters['token'] = self._serialize.query('token', token, 'str')
        response = self._send(http_method='DELETE',
                              location_id='dd3b8bd6-c7fc-4cbd-929a-933d9c011c9d',
                              version='5.0',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('AccessControlEntry', response)