bug#31711: qutebrowser is broken

[Rutger Helling]

Hi Guix,

qutebrowser fails to start with the recent python-pyqt upgrade,
possibly due to the removed qtwebkit input.

The following error occurs:
---

Fatal error: QtWebEngine is required to run qutebrowser but could not
be imported! Maybe it's not installed?

The error encountered was:
No module named 'PyQt5.QtWebEngineWidgets'

Please search for the python3 version of QtWebEngine in your
distributions packages, or install it via pip.

Please search for the python3 version of QtWebEngine in your
distributions packages, or install it via pip.

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