Fix issue #16140 bug that the fix to issue #16327 added - don't double

close subprocess.PIPE file descriptors when the child encounters an
error prior to exec.

Lib/subprocess.py

@@ -1274,9 +1274,6 @@ class Popen(object):
                     if e.errno != errno.ECHILD:
                         raise
                 child_exception = pickle.loads(data)
-                for fd in (p2cwrite, c2pread, errread):
-                    if fd is not None:
-                        os.close(fd)
                 raise child_exception