Issue #12400: test_zipimport_support doesn't restore original sys.stdout

anymore

regrtest doesn't check that a test doesn't output anything anymore.

Lib/test/test_zipimport_support.py

@@ -33,11 +33,6 @@ from test import test_doctest, sample_doctest
 
 
 def _run_object_doctest(obj, module):
-    # Direct doctest output (normally just errors) to real stdout; doctest
-    # output shouldn't be compared by regrtest.
-    save_stdout = sys.stdout
-    sys.stdout = test.support.get_original_stdout()
-    try:
     finder = doctest.DocTestFinder(verbose=verbose, recurse=False)
     runner = doctest.DocTestRunner(verbose=verbose)
     # Use the object's fully qualified name if it has one
@@ -51,8 +46,6 @@ def _run_object_doctest(obj, module):
     f, t = runner.failures, runner.tries
     if f:
         raise test.support.TestFailed("%d of %d doctests failed" % (f, t))
-    finally:
-        sys.stdout = save_stdout
     if verbose:
         print ('doctest (%s) ... %d tests with zero failures' % (module.__name__, t))
     return f, t