Remove now unused code from mgr-setup

[cbosdo]

What does this PR change?

Since Uyuni and SUSE Manager are now only shipped in containers there is only one use case of mgr-setup called from mgradm: mgr-setup -s -n. All other flags can go away... even those flags can be removed once mgradm stops using them as they will be the only behavior.

Test coverage

• No tests: setup script is only covered with end-to-end tests

• DONE

Links

Issue(s): #
Port(s): # add downstream PR(s), if any

• DONE

Changelogs

Make sure the changelogs entries you are adding are compliant with https://github.com/uyuni-project/uyuni/wiki/Contributing#changelogs and https://github.com/uyuni-project/uyuni/wiki/Contributing#uyuni-projectuyuni-repository

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• No changelog needed

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Re-run a test

If you need to re-run a test, please mark the related checkbox, it will be unchecked automatically once it has re-run:

• Re-run test "changelog_test"
• Re-run test "backend_unittests_pgsql"
• Re-run test "java_pgsql_tests"
• Re-run test "schema_migration_test_pgsql"
• Re-run test "susemanager_unittests"
• Re-run test "javascript_lint"
• Re-run test "spacecmd_unittests"

Before you merge

Check How to branch and merge properly!

[cbosdo]

tested to work here

[aaannz]

LGTM, there are just two more nitpicks. But I assume next we well take a look what remains and rework that, so they can be addressed later as well.

[cbosdo]

LGTM, there are just two more nitpicks. But I assume next we well take a look what remains and rework that, so they can be addressed later as well.

Addressed

[aaannz]

👍🏾