Incredibly frustratingly, given it seemed like a promising project
taking some steps that its forked predecessor has struggled to thus
far, particularly around encryption, and it’s already mature codebase,
upstream have nonetheless decided to stop supporting Pulse as an
individual project, thus, boneyard it goes. Sigh.

Closes Homebrew/homebrew#35800.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>