[MacPorts] #44326: msmtp: remove unused configure arg

[MacPorts]

#44326: msmtp: remove unused configure arg
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  Reporter:  ryandesign@…  |      Owner:  mww@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  msmtp         |
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Comment (by ryandesign@…):

 The other two configure args specifying `--mandir` and `--infodir` seem
 unnecessary as well since the specified values are the defaults. And
 adding `-lintl` to the configure.ldflags doesn't seem to be necessary
 either.

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Ticket URL: <https://trac.macports.org/ticket/44326#comment:1>
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