[MacPorts] #52761: xdelta1: mark port obsolete replaced by xdelta

[MacPorts]

#52761: xdelta1: mark port obsolete replaced by xdelta
-------------------------+------------------------------
 Reporter:  dbevans      |      Owner:  Torsten.Maehne@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  removal      |       Port:  xdelta1
-------------------------+------------------------------
 xdelta1 is an old glib1 based implementation of the current xdelta port
 version 3.0+.  Since glib1 is now being retired, so should this port be as
 well.

 Please advise that I have your authority as maintainer to remove this
 port.

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Ticket URL: <https://trac.macports.org/ticket/52761>
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