beta: remove old parsoid updater

Parsoid on beta cluster is now updated by having a Jenkins job running
directly on the deployment-parsoid2 instance.  This clean up the beta
autoupdater which would only act on the old repository under
mediawiki/extensions

Also remove wmf-beta-parsoid-remote.sh which is no more needed as well
as some related sudo rights.

bug: 57233
Change-Id: Ib84df643a725494515cc95ad92b37bb79aea91b7
Merge "beta: remove old parsoid updater" into production