This reverts commit d99ae41d:

 - This has been broken since 4.5 months.

 - The most we could expect from this extra feature is to give a tentative
   answer a few minutes earlier. But regardless of that answer, we still
   have to wait these few minutes anyway in most cases, so this does not
   buy us much.

⇒ I don't think fixing this is worth our time.

Closes #17749

Using the updated code from #16467.

Currently translated at 82.4% (28 of 34 strings)

Translation: Tails/wiki/src/doc/first_steps/start/not_entirely.inline.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrcdocfirst_stepsstartnot_entirelyinlinepo/es/

Currently translated at 82.4% (28 of 34 strings)

Translation: Tails/wiki/src/doc/first_steps/start/not_entirely.inline.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrcdocfirst_stepsstartnot_entirelyinlinepo/es/

Currently translated at 23.5% (8 of 34 strings)

Translation: Tails/wiki/src/doc/advanced_topics/boot_options.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrcdocadvanced_topicsboot_optionspo/es/

Currently translated at 67.6% (25 of 37 strings)

Translation: Tails/wiki/src/news/version_4.2.2.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrcnewsversion_422po/es/

Currently translated at 100.0% (9 of 9 strings)

Translation: Tails/wiki/src/home/testing.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrchometestingpo/fr/

Currently translated at 66.7% (6 of 9 strings)

Translation: Tails/wiki/src/home/testing.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrchometestingpo/es/

Currently translated at 100.0% (5 of 5 strings)

Translation: Tails/wiki/src/home/donate.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrchomedonatepo/es/

Currently translated at 54.0% (74 of 137 strings)

Currently translated at 8.7% (2 of 23 strings)

Currently translated at 55.6% (5 of 9 strings)

We already automatically test that all services have started correctly (#8262),
so no need to do it manually.

The only remaining bits in this area are:

 - looking at the Journal: not worth automating (#10279)
 - test that services that we disable are not started:
   not tested manually yet, automation is tracked on #10278