init: Remove deprecated args from hidden args
Summary:
The args have been deprecated since 0.17 (maybe longer) and since we reject unknown args, there is no need to add deprecated args to the list of hidden args and then hand-craft an error message if a user provides them.
Backport of core PR14272.
Test Plan:
arc lint --everything ninja check check-functional
Reviewers: #bitcoin_abc, deadalnix
Reviewed By: #bitcoin_abc, deadalnix
Differential Revision: https://reviews.bitcoinabc.org/D5778