feat: remove unused --name flag

[netlify-team-account-1]

While testing #3717, I wondered what the --name flag of ntl functions:list does. Looking through the code, I can't find a single usage of the flag. Maybe it's a remnant from some copy & paste.

Technically we remove a flag, which would be a breaking change - but since it doesn't do anything, I think it's fine to assume nobody uses it. Is it still a breaking change?

[github-actions]

📊 Benchmark results

Comparing with 16712b7

Package size: 358 MB

⬇️ 0.00% decrease vs. 16712b7

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• T-30 (16712b7): 358 MB
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• T-9 (f196c10): 363 MB
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• T-2 (1ba0087): 363 MB
• T-1 (f44155b): 363 MB
• T (current commit): 358 MB

[netlify-team-account-1]

@lukasholzer I'll hold this PR open until #3717 is merged, so you don't get any weird conflicts because of it.

[lukasholzer]

@netlify-team-account-1 I will take over this and migrate it to the new commander framework