Geo - Remove legacy Sidekiq workers

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138377



Merged-by: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Approved-by: Aakriti Gupta <agupta@gitlab.com>
Approved-by: Michael Kozono <mkozono@gitlab.com>
Approved-by: Michał Zając <mzajac@gitlab.com>
Approved-by: Ethan Urie <eurie@gitlab.com>
Reviewed-by: Michael Kozono <mkozono@gitlab.com>
Reviewed-by: Aakriti Gupta <agupta@gitlab.com>