[MacPorts] #47414: gwyddion: remove icu dependency

[MacPorts]

#47414: gwyddion: remove icu dependency
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  Reporter:  ryandesign@…  |      Owner:  rowue@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.3.99
Resolution:                |   Keywords:
      Port:  gwyddion      |
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Comment (by rowue@…):

 Removed dependency in r135755 - checked against x11 and quartz

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Ticket URL: <https://trac.macports.org/ticket/47414#comment:1>
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