Remove a case that is no longer reachable in encodings.py.

This case was originally designed to handle Exception's which didn't gracefully support coercing themselves to unicode. However, because it lives in the `else` case of `if hasattr(s, '__unicode__'):` we can be sure it's no longer reachable in djanog anymore, because since Python 2.5 exception has subclassed object, which means Exception objects always have an __unicode__ method.

django/utils/encoding.py

@@ -98,25 +98,13 @@ def force_text(s, encoding='utf-8', strings_only=False, errors='strict'):
             if hasattr(s, '__unicode__'):
                 s = s.__unicode__()
             else:
-                try:
-                    if six.PY3:
-                        if isinstance(s, bytes):
-                            s = six.text_type(s, encoding, errors)
-                        else:
-                            s = six.text_type(s)
+                if six.PY3:
+                    if isinstance(s, bytes):
+                        s = six.text_type(s, encoding, errors)
                     else:
-                        s = six.text_type(bytes(s), encoding, errors)
-                except UnicodeEncodeError:
-                    if not isinstance(s, Exception):
-                        raise
-                    # If we get to here, the caller has passed in an Exception
-                    # subclass populated with non-ASCII data without special
-                    # handling to display as a string. We need to handle this
-                    # without raising a further exception. We do an
-                    # approximation to what the Exception's standard str()
-                    # output should be.
-                    s = ' '.join([force_text(arg, encoding, strings_only,
-                            errors) for arg in s])
+                        s = six.text_type(s)
+                else:
+                    s = six.text_type(bytes(s), encoding, errors)
         else:
             # Note: We use .decode() here, instead of six.text_type(s, encoding,
             # errors), so that if s is a SafeBytes, it ends up being a