Do not unregister signals during finalisation due to https://bugs.python.org/issue26133.
Do not unregister signals during finalisation due to https://bugs.python.org/issue26133.

PiperOrigin-RevId: 406343350
Change-Id: I774598bb4508120c81dbce90a7acde77600aeab7

deepmind/launchpad,deepmind/launchpad,deepmind/launchpad,deepmind/launchpad