[MacPorts] #59702: xboard +gtk has unneeded dependencies

[MacPorts]

#59702: xboard +gtk has unneeded dependencies
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 Reporter:  ryandesign  |      Owner:  kurthindenburg
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.2
 Keywords:              |       Port:  xboard
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 When the new xboard +gtk variant is used, the port still has dependencies
 on xorg-libice, xorg-libsm, xorg-libXaw, xorg-libXmu, xorg-libXt with
 which the port does not link unless the gtk variant is not used.

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Ticket URL: <https://trac.macports.org/ticket/59702>
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