[MacPorts] #70799: R: all compilers blacklisted on macOS 15

[MacPorts]

#70799: R: all compilers blacklisted on macOS 15
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  Reporter:  i0ntempest  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  sequoia
      Port:  R           |
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Comment (by markemer):

 Clang 17 and 16 are working now (and 14 and 15 are on the way!) so we
 might want to revert that change and close the ticket.

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Ticket URL: <https://trac.macports.org/ticket/70799#comment:14>
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