message: Remove `scipy` dependency.
  We have added it temporarily to prevent a segfault due to ABI breakage in `scipy==1.4.1` but never removed it after fixing.
  Fixes Fixes 35709. Closes
diff: @@ -69,8 +69,6 @@ REQUIRED_PACKAGES = [
  'wrapt >= 1.11.1',
  'wheel >= 0.26',
  'six >= 1.12.0',
  - # scipy < 1.4.1 causes segfaults due to pybind11
  - 'scipy == 1.4.1',
  ]
  if sys.byteorder == 'little':
  