[MacPorts] #68130: py-pip, py-virtualenv: drop EOL pythons >= 3.4?

[MacPorts]

#68130: py-pip, py-virtualenv: drop EOL pythons >= 3.4?
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  Reporter:  jmroot                |      Owner:  (none)
      Type:  defect                |     Status:  new
  Priority:  Normal                |  Milestone:
 Component:  ports                 |    Version:
Resolution:                        |   Keywords:
      Port:  py-pip py-virtualenv  |
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Comment (by jmroot):

 The utility might be debatable for some of those versions, but 2.7 at
 least will, for better or worse, continue to be relevant for some time.
 All of these older ports are not there because you should use them, but
 because you might have to.

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Ticket URL: <https://trac.macports.org/ticket/68130#comment:2>
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