Issue #14742: Don't include DirectoryTestCase from test_unparse in test_tools...

Issue #14742:  Don't include DirectoryTestCase from test_unparse in test_tools until we can speed it up.

Lib/test/test_tools.py

@@ -124,7 +124,7 @@ class Gprof2htmlTests(unittest.TestCase):
 
 # Run the tests in Tools/parser/test_unparse.py
 with support.DirsOnSysPath(os.path.join(basepath, 'parser')):
-    from test_unparse import UnparseTestCase, DirectoryTestCase
+    from test_unparse import UnparseTestCase
 
 
 def test_main():