[MacPorts] #48131: oxygen-gtk2, oxygen-gtk3: move common code out of subports

[MacPorts]

#48131: oxygen-gtk2, oxygen-gtk3: move common code out of subports
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 Reporter:  ryandesign@…  |      Owner:  rjvbertin@…
     Type:  enhancement   |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.3.99
 Keywords:  haspatch      |       Port:  oxygen-gtk2, oxygen-gtk3
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 This patch simplifies the oxygen-gtk2 and oxygen-gtk3 ports by moving
 common code out of the subport blocks and into the main part of the
 portfile.

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Ticket URL: <https://trac.macports.org/ticket/48131>
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