Remove reference to non-existant session_scope.

migrations/versions/144929e0f5f_improve_operation_scheduling.py

@@ -13,7 +13,6 @@ down_revision = None
 from alembic import op
 import sqlalchemy as sa
 
-from accountant import session_scope
 from accountant.api.models.scheduled_operations import ScheduledOperation
 
 
@@ -52,7 +51,6 @@ def upgrade():
         "alter sequence entry_id_seq rename to operation_id_seq"
     )
 
-    # TODO Alexis Lahouze 2015-07-17 Insert scheduling.
     connection = op.get_bind()
     Session = sa.orm.sessionmaker()
     session = Session(bind=connection)