Remove workaround for sphinx-contrib/sphinx-lint#83

Author: jaraco

tox.ini

@@ -31,9 +31,7 @@ extras =
 changedir = docs
 commands =
 	python -m sphinx -W --keep-going . {toxinidir}/build/html
-	python -m sphinxlint \
-		# workaround for sphinx-contrib/sphinx-lint#83
-		--jobs 1
+	python -m sphinxlint
 
 [testenv:finalize]
 description = assemble changelog and tag a release