All buildbots broken

Looks like all buildbots are broken.

What is going on ?

The main error seems to be

ImportError: cannot import name _pvpythonmodules_importer

suspect it’s simply an issue of clean builds. This mr removes that file but I suspect other MRs that were tested after this MR was tested did not rebuild this file. The MR has been merged, so the dashboards should now do a clean build soon. If you rebase and retest your MRs in a little while, they should be fine.