Drop explicit locale setting

Python3 now sets unicode locale automatically, this workaround
should not be necessary anymore. For python2, let's use the lighter locale.

python-sphinx.spec

@@ -27,7 +27,7 @@
 
 Name:       python-sphinx
 Version:    1.7.6
-Release:    1%{?dist}
+Release:    2%{?dist}
 Epoch:      1
 Summary:    Python documentation generator
 
@@ -553,13 +553,13 @@ rm tests/test_build_linkcheck.py
 
 # Igoring test_api_translator for now as it fails on Fedora.
 # The issue has been reported upstream: https://github.com/sphinx-doc/sphinx/issues/4710
-LANG=en_US.UTF-8 %{__python2} -m pytest -v --ignore=tests/test_api_translator.py
+LANG=C.UTF-8 %{__python2} -m pytest -v --ignore=tests/test_api_translator.py
 %if 0%{?with_python3}
 pushd %{py3dir}
 # Currently, all linkcheck tests hit external websites.  Since network access
 # is disabled in koji, we have to disable these.
 rm tests/test_build_linkcheck.py
-LANG=en_US.UTF-8 PYTHON=python3 make test
+PYTHON=python3 make test
 popd
 %endif # with_python3
 %endif # with tests
@@ -618,6 +618,10 @@ popd
 
 
 %changelog
+* Sun Nov 18 2018 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 1:1.7.6-2
+- Drop explicit locale setting for python3, use C.UTF-8 for python2
+  See https://fedoraproject.org/wiki/Changes/Remove_glibc-langpacks-all_from_buildroot
+
 * Mon Jul 23 2018 Marcel Plch <mplch@redhat.com> - 1:1.7.6-1
 - Update to 1.7.6