locale: Don't remove language preference on logout

When a logged-in user is logs out, keep the language preference of the user who
was just logged in. This is Django behavior, don't overwrite it.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/sso/views.py

@@ -111,11 +111,6 @@ class SSOLogoutView(LogoutView):
     def dispatch(self, request, *args, **kwargs):
         response = super(SSOLogoutView, self).dispatch(request, *args,
                                                        **kwargs)
-        try:
-            del request.session[translation.LANGUAGE_SESSION_KEY]
-        except KeyError:
-            pass
-
         response.delete_cookie(SSO_COOKIE_NAME)
         return response