remove pytest.ini and put settings in tox.ini

Author: basnijholt

pytest.ini

@@ -4,6 +4,7 @@ isolated_build = True
 envlist = clean,py{36,37},report,pre-commit
 
 [pytest]
+testpaths = adaptive
 addopts =
   --durations=5
   --cov --cov-append --cov-fail-under=70 --cov-report=