Removing unused variables

${probableCause}

${invalidAlarmId}    invalidAlramID

${Etag}=    an etag

${Etag_modified}=    a modified etag

${CONTENT_TYPE_PATCH}    application/merge-patch+json

${PerceivedSeverity}    CRITICAL

${sub_filter}    filter

${sub_filter_invalid}    filter_invalid

${subscriptionId}    6fc3539c-e602-4afa-8e13-962fb5a7d81f

${notification_type}    AlarmNotification

${AlarmNotification}    {}

${AlarmClearedNotification}    {}

${AlarmListRebuiltNotification}    {}

${invalid_etag}=    invalid etag

${response}    {}

${req_mock}    {}

${resp_mock}    {}

${callback_uri}    http://localhost

${callback_port}    9091

${callback_endpoint}    /endpoint

${callback_endpoint_fwd}    /endpoint/check

${callback_endpoint_error}    /endpoint_404

${sleep_interval}    20s

${total_polling_time}   2 min

${polling_interval}     10 sec

${notification_request}    []

${notification_response}    []