[MacPorts] #44119: kdelibs4: remove FindFlex.cmake

[MacPorts]

#44119: kdelibs4: remove FindFlex.cmake
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  Reporter:  mojca@…   |      Owner:  nicos@…
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  kdelibs4  |
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Comment (by mojca@…):

 The main question is: why does `kdelibs4` even need its own
 `FindFlex.cmake` if it's already part of CMake?

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Ticket URL: <https://trac.macports.org/ticket/44119#comment:2>
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