[MacPorts] #63684: GitUp @1.2: remove Sparkle updater

[MacPorts]

#63684: GitUp @1.2: remove Sparkle updater
-------------------------+--------------------
 Reporter:  cooljeanius  |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.7.1
 Keywords:               |       Port:  GitUp
-------------------------+--------------------
 GitUp tries to update itself via Sparkle when launched. Ports should just
 rely on MacPorts as the way for users to update them instead. There are
 other ports that remove Sparkle, too, that you can study to copy.

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Ticket URL: <https://trac.macports.org/ticket/63684>
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