Remove daily cron schedule from incremental model

- Remove the '@daily' cron schedule from the incremental model configuration
- Simplify model scheduling configuration

Author: Adriano Sanges

real-estate-sqlmesh/models/incremental_model.sql

@@ -4,7 +4,6 @@ MODEL (
     time_column (created_at, '%Y-%m-%d %H:%M:%S.%f')
   ),
   start '2020-01-01',
-  cron '@daily',
   grain (url)
 );