[MacPorts] #60193: opencv should not be dependent on Java12

[MacPorts]

#60193: opencv should not be dependent on Java12
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  Reporter:  WolfgangFahl  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:                |
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Comment (by ryandesign):

 opencv should only be using java 12 if you have requested the +java
 variant. If you don't want opencv to do that, don't request that variant.

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Ticket URL: <https://trac.macports.org/ticket/60193#comment:1>
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