Lock expiration not triggering task clear

Describe the bug
Tasks with "lock expired" status are not being cleared as expected.

To Reproduce
Steps to reproduce the behavior:

Start a task and lock it.
Wait for the task lock to expire.
Check the task's status.
Notice that the expired lock tasks are not cleared.
Expected behavior
Once a task's lock has expired, it should be cleared automatically or made available for processing again.

Environment (please complete the following information):

OS: Ubuntu 20.04
Label Studio Version: 1.8.2
Additional context
There might be an underlying issue with the task clearing mechanism. It's essential to ensure that tasks with expired locks are processed correctly to maintain system efficiency.