Remove unused names in except clauses
diff --git a/Lib/shutil.py b/Lib/shutil.py
index 329add0..8718884 100644
--- a/Lib/shutil.py
+++ b/Lib/shutil.py
@@ -267,7 +267,7 @@
     names = []
     try:
         names = os.listdir(path)
-    except os.error as err:
+    except os.error:
         onerror(os.listdir, path, sys.exc_info())
     for name in names:
         fullname = os.path.join(path, name)
@@ -280,7 +280,7 @@
         else:
             try:
                 os.remove(fullname)
-            except os.error as err:
+            except os.error:
                 onerror(os.remove, fullname, sys.exc_info())
     try:
         os.rmdir(path)
@@ -323,7 +323,7 @@
             raise Error("Destination path '%s' already exists" % real_dst)
     try:
         os.rename(src, real_dst)
-    except OSError as exc:
+    except OSError:
         if os.path.isdir(src):
             if _destinsrc(src, dst):
                 raise Error("Cannot move a directory '%s' into itself '%s'." % (src, dst))