Don't remove session at the end of main init

Signed-off-by: Mattia Verga <mattia.verga@tiscali.it>

bodhi-server/bodhi/server/__init__.py

@@ -344,9 +344,6 @@ def main(global_config, testing=None, session=None, **settings):
         # the return value.
         generic._generate_home_page_stats()
 
-    # Let's close out the db session we used to warm the caches.
-    Session.remove()
-
     log.info('Bodhi ready and at your service!')
     app = config.make_wsgi_app()
     return app

bodhi-server/tests/test___init__.py

@@ -143,13 +143,6 @@ def test_authtkt_timeout_undefined(self, set_security_policy):
         assert policy.helper.timeout == 86400
         set_security_policy.assert_called_once_with(policy)
 
-    def test_calls_session_remove(self):
-        """Let's assert that main() calls Session.remove()."""
-        with mock.patch('bodhi.server.Session.remove') as remove:
-            server.main({}, session=self.db, **self.app_settings)
-
-        remove.assert_called_once_with()
-
     @mock.patch('bodhi.server.bugs.set_bugtracker')
     def test_calls_set_bugtracker(self, set_bugtracker):
         """