refactor: remove unused test class setting

unittest_mixins would check that files got created if a test made a
temporary directory, so that we could trim down making temp dirs
needlessly.

But we don't use unittest_mixins any more, so this setting does nothing.
Remove it.

1 files changed, 0 insertions, 4 deletions

diff --git a/tests/test_api.py b/tests/test_api.py
index 93b14c58..e7f02738 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -791,10 +791,6 @@ class NamespaceModuleTest(UsingModulesMixin, CoverageTest):
 class IncludeOmitTestsMixin(UsingModulesMixin, CoverageTest):
     """Test methods for coverage methods taking include and omit."""
 
-    # We don't write any source files, but the data file will collide with
-    # other tests if we don't have a temp dir.
-    no_files_in_temp_dir = True
-
     def filenames_in(self, summary, filenames):
         """Assert the `filenames` are in the keys of `summary`."""
         for filename in filenames.split():