extend/ENV/super: remove outdated cccfg flag comments

[cho-m]

Minor update for outdated comment I noticed while working on some shim changes.

Removed in 20eab94

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[Copilot]

Pull request overview

This PR cleans up the HOMEBREW_CCCFG flag documentation in ENV/super by removing comment entries for flags/behavior that are no longer controlled via HOMEBREW_CCCFG, keeping the inline reference accurate for maintainers working on the compiler shim pipeline.

Changes:

• Remove the outdated o (-oso_prefix) flag comment from the HOMEBREW_CCCFG documentation block.
• Remove the outdated note about “These flags will also be present” and the a (apr-1-config) fix flag.

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[krehel]

Thanks!

[MikeMcQuaid]

Thanks!