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/gazelle/pages/base.py

@@ -21,9 +21,6 @@
 from weboob.tools.browser import BrowserUnavailable, BasePage as _BasePage
 
 
-__all__ = ['BasePage']
-
-
 class BasePage(_BasePage):
     def on_loaded(self):
         errors = []

modules/gazelle/pages/index.py

@@ -22,9 +22,6 @@ from weboob.tools.browser import BrowserIncorrectPassword, BrowserBanned
 from .base import BasePage
 
 
-__all__ = ['IndexPage', 'LoginPage']
-
-
 class IndexPage(BasePage):
     def is_logged(self):
         return 'id' in self.document.find('body').attrib

modules/gazelle/pages/torrents.py

@@ -31,9 +31,6 @@ from weboob.capabilities.base import NotLoaded
 from .base import BasePage
 
 
-__all__ = ['TorrentsPage']
-
-
 class TorrentsPage(BasePage):
     TORRENTID_REGEXP = re.compile('torrents\.php\?action=download&id=(\d+)')