Remove unused/disabled docs conditional

Sphinx-generated HTML documentation is unsuitable for packaging; see
https://bugzilla.redhat.com/show_bug.cgi?id=2006555 and linked mailing
list threads.

It might be possible to generate a PDF with Sphinx; if so, the best way
would be to use the GitHub source archive if necessary to get
requirements_docs.txt and use it to generate BuildRequires. However, it
seems unlikely that this will be worthwhile.

python-pint.spec

@@ -1,5 +1,4 @@
 %global pypi_name Pint
-%bcond_with docs
 
 Name:           python-pint
 Version:        0.17
@@ -38,27 +37,6 @@ to different units.
 It is distributed with a comprehensive list of physical units, prefixes
 and constants.
 
-%if %{with docs}
-%package -n python3-pint-doc
-Summary:        Documentation for the pint module
-%{?python_provide:%python_provide python3-pint-doc}
-
-BuildRequires:  pandoc
-BuildRequires:  python3-graphviz
-BuildRequires:  python3-ipykernel
-BuildRequires:  python3-jupyter-client
-BuildRequires:  python3-matplotlib
-BuildRequires:  python3-nbsphinx
-BuildRequires:  python3-pandas
-BuildRequires:  python3-dask
-BuildRequires:  python3-pygments
-BuildRequires:  python3-sphinx
-BuildRequires:  python3-xarray
-
-%description -n python3-pint-doc
-Documentation for the pint module
-%endif
-
 %prep
 %setup -q -n %{pypi_name}-%{version}
 
@@ -87,14 +65,6 @@ sed -i '/@helpers.requires_numpy_at_least("1.16")/d' pint/testsuite/test_quantit
 %build
 %pyproject_wheel
 
-%if %{with docs}
-export PYTHONPATH="$( pwd ):$PYTHONPATH"
-sphinx-build-3 docs html
-# remove the sphinx-build leftovers
-
-rm -rf html/.{doctrees,buildinfo}
-%endif
-
 %install
 %pyproject_install
 
@@ -107,11 +77,5 @@ rm -rf html/.{doctrees,buildinfo}
 %{python3_sitelib}/pint
 %{python3_sitelib}/Pint-%{version}.*
 
-%if %{with docs}
-%files -n python3-pint-doc
-%doc html
-%license docs/_themes/LICENSE
-%endif
-
 %changelog
 %autochangelog