idnits: remove bottle :unneeded

[Amar1729]

• Have you followed the guidelines for contributing?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

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See #75943.

[Amar1729]

Getting either failures fetching files or "seems to be corrupt" errors on all platforms during brew test. Maybe somebody familiar with idnits has some insight?

idnits 2.16.05

draft-ietf-tcpm-undeployed-03.txt:
   Attempted to download rfc0675 state...
   Failure fetching the file, proceeding without it.
   Attempted to download rfc0793 state...
   The downloaded file seems to be corrupt, proceeding with outdated information.

[github-actions]

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