community/salt: remove stale patch for python3.10 compatibility

it is broken and does not really work with python3.10 as it does not use the import as name "importlib_metadata". It is also removed from salt: https://github.com/saltstack/salt/commit/8e008cfd1ebf124cac7ff3b8b01373827cf9f70f
8 jobs for !35579 with master in 11 minutes and 13 seconds
merge request