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/gdfsuez/pages/history.py

@@ -30,8 +30,6 @@ from weboob.tools.browser import BasePage
 from weboob.capabilities.base import NotAvailable
 from weboob.capabilities.bill import Detail, Bill
 
-__all__ = ['HistoryPage', 'PdfPage']
-
 
 class HistoryPage(BasePage):
 

modules/gdfsuez/pages/homepage.py

@@ -22,8 +22,6 @@ from datetime import date
 from weboob.tools.browser import BasePage
 from weboob.capabilities.bill import Subscription
 
-__all__ = ['LoginPage', 'HomePage', 'AccountPage', 'TimeoutPage']
-
 
 class LoginPage(BasePage):
 

modules/gdfsuez/test.py

@@ -22,9 +22,6 @@
 from weboob.tools.test import BackendTest
 
 
-__all__ = ['GdfSuezTest']
-
-
 class GdfSuezTest(BackendTest):
     BACKEND = 'gdfsuez'