gnu: python-pyro-ppl: Simplify inputs.

* gnu/packages/machine-learning.scm (python-pyro-ppl)[native-inputs]: Remove
ninja, jupyter, python-black, python-flake8, python-graphviz, python-isort,
python-lap, python-matplotlib, python-mypy, python-nbformat, python-nbsphinx,
python-nbstripout, python-nbval, python-pandas, python-pillow,
python-pypandoc, python-pytest, python-pytest-cov, python-pytest-xdist,
python-scikit-learn, python-scipy, python-seaborn, python-sphinx,
python-sphinx-rtd-theme, python-torchvision, python-visdom, python-wget,
python-yapf.

Change-Id: Id7a413fdbdd8a808dffb4804c8a7f04bf2c31bbc

gnu/packages/machine-learning.scm

@@ -5506,35 +5506,6 @@ and Numpy.")
            python-pyro-api
            python-pytorch
            python-tqdm))
-    (native-inputs
-     (list ninja
-           jupyter
-           python-black
-           python-flake8
-           python-graphviz
-           python-isort
-           python-lap
-           python-matplotlib
-           python-mypy
-           python-nbformat
-           python-nbsphinx
-           python-nbstripout
-           python-nbval
-           python-pandas
-           python-pillow
-           python-pypandoc
-           python-pytest
-           python-pytest-cov
-           python-pytest-xdist
-           python-scikit-learn
-           python-scipy
-           python-seaborn
-           python-sphinx
-           python-sphinx-rtd-theme
-           python-torchvision
-           python-visdom
-           python-wget
-           python-yapf))
     (home-page "https://pyro.ai")
     (synopsis "Python library for probabilistic modeling and inference")
     (description