Go back to the old way of freeing tc_MemList when task is not removing itself.

Go back to the old way of freeing tc_MemList when task is not removing itself.
In this case it's unsafe to send it to the service task, because by the time
the service task processes it, the task structure may have been freed
following the return from RemTask().

git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@45008 fb15a70f-31f2-0310-bbcc-cdcc74a49acc