[MacPorts] #47383: mpv: remove icu dependency

[MacPorts]

#47383: mpv: remove icu dependency
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 Reporter:  ryandesign@…  |      Owner:  ionic@…
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.3.99
 Keywords:                |       Port:  mpv
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 mpv declares a library dependency on icu but I can find no evidence that
 it is used.

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Ticket URL: <https://trac.macports.org/ticket/47383>
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