[MacPorts] #57521: py37-pyqt5: Patch failure on 10.7

[MacPorts]

#57521: py37-pyqt5: Patch failure on 10.7
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  Reporter:  ryandesign  |      Owner:  mamoll
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  py-pyqt5    |
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Comment (by ryandesign):

 It does look like patch-use-default-sip.diff was introduced
 [changeset:809260494f43a0a92aad27de91eb35efdae0262a/macports-ports when
 pyqt5 was updated to 5.11.2], so excluding the patch for pyqt5 5.9.2 used
 on older systems does seem fine. But see also #56601 which still has
 questions about pinning older OS versions to this version.

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Ticket URL: <https://trac.macports.org/ticket/57521#comment:3>
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