Remove effectless expression statement.
diff --git a/Lib/pydoc.py b/Lib/pydoc.py
index 26cd55d..7585b18 100755
--- a/Lib/pydoc.py
+++ b/Lib/pydoc.py
@@ -1197,7 +1197,6 @@
             else:
                 tag = "inherited from %s" % classname(thisclass,
                                                       object.__module__)
-            filter(lambda t: not t[0].startswith('_'), attrs)
 
             # Sort attrs by name.
             attrs.sort()