tests: remove TestDir (#8502)

remove TestDir

tests/basic_env.py

@@ -94,7 +94,7 @@ class TestDirFixture:
         self._popd()
         try:
             remove(self._root_dir)
-        except OSError as exc:
+        except OSError as exc:  # pragma: no cover
             # pylint: disable=no-member
             # We ignore this under Windows with a warning because it happened
             # to be really hard to trace all not properly closed files.
@@ -149,12 +149,6 @@ class TestDvcGitFixture(TestGitFixture):
 # NOTE: Inheritance order in the classes below is important.
 
 
-class TestDir(TestDirFixture, TestCase):
-    def __init__(self, methodName):
-        TestDirFixture.__init__(self)
-        TestCase.__init__(self, methodName)
-
-
 class TestDvc(TestDvcFixture, TestCase):
     def __init__(self, methodName):
         TestDvcFixture.__init__(self)

tests/func/test_gc.py

@@ -12,7 +12,7 @@ from dvc.fs import LocalFileSystem
 from dvc.repo import Repo as DvcRepo
 from dvc.utils.fs import remove
 from dvc_data.hashfile.db.local import LocalHashFileDB
-from tests.basic_env import TestDir, TestDvcGit
+from tests.basic_env import TestDvcGit
 
 
 class TestGC(TestDvcGit):
@@ -122,7 +122,7 @@ class TestGCMultipleDvcRepos(TestDvcGit):
 
     def setUp(self):
         super().setUp()
-        self.additional_path = TestDir.mkdtemp()
+        self.additional_path = self.mkdtemp()
         self.additional_git = Repo.init(self.additional_path)
         self.additional_dvc = DvcRepo.init(self.additional_path)