Stop to use $SPHINX_TEST_TEMPDIR envvar

At once, we added $SPHINX_TEST_TEMPDIR to keep intermediate files of
testing to investigate the failures.  At present, we've used pytest
as a test runner.  And it keeps temporary directories of last 3
testings.  So this starts to use it instead of $SPHINX_TEST_TEMPDIR.
https://docs.pytest.org/en/latest/tmpdir.html#the-default-base-temporary-directory

1 files changed, 0 insertions, 19 deletions

diff --git a/tests/conftest.py b/tests/conftest.py
index 7d0c1570b..a8392a6c0 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -7,7 +7,6 @@
 """
 
 import os
-import shutil
 
 import docutils
 import pytest
@@ -32,23 +31,5 @@ def pytest_report_header(config):
             (sphinx.__display_version__, docutils.__version__))
 
 
-def _initialize_test_directory(session):
-    testroot = os.path.join(str(session.config.rootdir), 'tests')
-    tempdir = os.path.abspath(os.getenv('SPHINX_TEST_TEMPDIR',
-                              os.path.join(testroot, 'build')))
-    os.environ['SPHINX_TEST_TEMPDIR'] = tempdir
-
-    print('Temporary files will be placed in %s.' % tempdir)
-
-    if os.path.exists(tempdir):
-        shutil.rmtree(tempdir)
-
-    os.makedirs(tempdir)
-
-
-def pytest_sessionstart(session):
-    _initialize_test_directory(session)
-
-
 def pytest_assertrepr_compare(op, left, right):
     comparer.pytest_assertrepr_compare(op, left, right)