BUG/MINOR: stream: Remove BUG_ON about the task expiration in process_stream()

At the end of process_stream(), A BUG_ON was recently added to abort if we
leave the function with an expired task. However, it may happen if an event
prevents the timeout to be handled but nothing evolved. In this case, the
task expiration is not updated and we expect to catch the timeout on the
immediate task wakeup.

No backport needed.
1 file changed