activerecord: Remove redundant steep:ignore FallbackAny comments

[kozy4324]

steep 2.0.0 reports these as Ruby::RedundantIgnoreComment errors.

activerecord-generated.rb:39:69: [error] Redundant ignore comment
│ Diagnostic ID: Ruby::RedundantIgnoreComment
│
└ User.preload(:address, friends: [:address, { followers: :users }]) # steep:ignore FallbackAny

The ignore comments were no longer needed, so they were removed.

[github-actions]

@kozy4324 Thanks for your contribution!

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---

activerecord

You changed RBS files for an existing gem.
You need to get approval from the reviewers of this gem.

@hibariya, @ksss, @Little-Rubyist, @tk0miya, please review this pull request.
If this change is acceptable, please make a review comment including APPROVE from here.

After that, the PR author or the reviewers can merge this PR.
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[ksss]

APPROVE

[github-actions]

Thanks for your review, @ksss!

@kozy4324, @ksss This PR is ready to be merged.
Just comment /merge to merge this PR.

[kozy4324]

/merge