[MacPorts] #64977: pdfgrep-legacy: remove or make obsolete

[MacPorts]

#64977: pdfgrep-legacy: remove or make obsolete
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 Reporter:  evanmiller  |      Owner:  raimue
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.7.2
 Keywords:              |       Port:  pdfgrep-legacy
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 Regular {{{pdfgrep}}} can be compiled all the way back to 10.4 using GCC7,
 so {{{pdfgrep-legacy}}} should be removed or made obsolete.

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Ticket URL: <https://trac.macports.org/ticket/64977>
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