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/freemobile/pages/history.py

@@ -31,9 +31,6 @@ from weboob.tools.browser2.filters import Date, CleanText, Attr, Filter,\
 from weboob.capabilities.bill import Detail, Bill
 
 
-__all__ = ['HistoryPage', 'DetailsPage', 'BadUTF8Page']
-
-
 class FormatDate(Filter):
     def filter(self, txt):
         return datetime.strptime(txt, "%Y%m%d").date()