[MacPorts] #71877: fizz, folly, mvfst: remove libunwind dependency

[MacPorts]

#71877: fizz, folly, mvfst: remove libunwind dependency
---------------------------------+--------------------------
  Reporter:  mohd-akram          |      Owner:  barracuda156
      Type:  defect              |     Status:  closed
  Priority:  Normal              |  Milestone:
 Component:  ports               |    Version:
Resolution:  fixed               |   Keywords:
      Port:  fizz, folly, mvfst  |
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Comment (by kencu):

 It will still link opportunistically though

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Ticket URL: <https://trac.macports.org/ticket/71877#comment:4>
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