Bug#966052: spyder-kernels: Uses old name of sip module

[Drew Parsons]

Source: spyder-kernels
Followup-For: Bug #966052

spyder-kernels' use of sip is conditional to having environment
variable QT_API='pyqt', corresponding to PyQt 2 as I understand it.
It is only referenced in spyder_kernels/customize/spydercustomize.py
(lines 170, 172)

So it will not be accessed in a PyQt5 environment (where QT_API is not
set to 'pyqt').

spyder-kernels 1.10.1 applies other tests for PyQt5, but using
PyQt5.QtWidgets not .sip.

I think we don't need to patch anything in spyder-kernels. It's
already accounting for PyQt5. I think we can close this bug.