bpo-33687: Fix call to os.chmod() in uu.decode() (GH-7282)

diff --git a/Lib/uu.py b/Lib/uu.py
index 8333e86..9b1e5e6 100755
--- a/Lib/uu.py
+++ b/Lib/uu.py
@@ -133,10 +133,7 @@
             out_file = sys.stdout.buffer
         elif isinstance(out_file, str):
             fp = open(out_file, 'wb')
-            try:
-                os.path.chmod(out_file, mode)
-            except AttributeError:
-                pass
+            os.chmod(out_file, mode)
             out_file = fp
             opened_files.append(out_file)
         #