* gnu/packages/sphinx.scm (python-sphinx): Update to 2.0.1.
[arguments]: Remove Python2 workaround.
[propagated-inputs]: Remove PYTHON-SIX and PYTHON-SPHINXCONTRIB-WEBSUPPORT.
Add PYTHON-SPHINXCONTRIB-APPLEHELP, PYTHON-SPHINXCONTRIB-DEVHELP,
PYTHON-SPHINXCONTRIB-HTMLHELP, PYTHON-SPHINXCONTRIB-JSMATH,
PYTHON-SPHINXCONTRIB-QTHELP, and PYTHON-SPHINXCONTRIB-SERIALIZINGHTML.
(python2-sphinx)[source]: Stay on version 1.7.7.
[arguments]: New field.
[propagated-inputs]: Do not inherit from the Python 3 Sphinx variant.
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