Breaking: #98489 - Removal of SleepTask and TestTask

See forge#98489

Description

Previous TYPO3 installation contained the task SleepTask and TestTask which served as examples when scheduler was introduced in 2009.

The tasks have been removed without substitution.

Impact

The scheduler tasks are not available anymore and won't be executed.

Affected installations

All TYPO3 installations relying on these scheduler tasks.

Migration

If used, the tasks can be removed within the scheduler module.

The configuration $GLOBALS['TYPO3_CONF_VARS']['EXTENSIONS']['scheduler']['showSampleTasks'] is removed automatically.