Remove useless __all__ in modules

They bring nothing of value (we never use import * anyway) and introduce
a maintenance burden.

The __all__ that I left might not be very useful either but at least
they are not a pain to maintain; they are also used by pyflakes in some
cases.

modules/sueurdemetal/pages.py

@@ -24,9 +24,6 @@ import re
 from urlparse import urljoin
 
 
-__all__ = ['PageCity', 'PageConcert', 'PageCityList', 'PageDate', 'PageDates']
-
-
 class PageWithConcerts(BasePage):
     def extract_concert(self, concert_table):
         d = {}