Add `pkgutil --forget org.wireshark.ChmodBPF.pkg` to the "Uninstall
ChmodBPF" postinstall script. The `pkgutil` man page says
--forget package-id
Discard all receipt data about package-id, but do not touch the
installed files. DO NOT use this command from an installer package
script to fix broken package design.
but Homebrew's Wireshark cask does this, and it should help to work
around issue #18734.
Add `pkgutil --forget org.wireshark.path_helper.pkg` to the "Remove
Wireshark from the system path" postinstall script.
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