Removed deprecated database configuration.

• Removed deprecated configuration sql_alchemy_conn from core. Please use sql_alchemy_conn from database instead.
• Removed deprecated configuration sql_engine_encoding from core. Please use sql_engine_encoding from database instead.
• Removed deprecated configuration sql_engine_collation_for_ids from core. Please use sql_engine_collation_for_ids from database instead.
• Removed deprecated configuration sql_alchemy_pool_enabled from core. Please use sql_alchemy_pool_enabled from database instead.
• Removed deprecated configuration sql_alchemy_pool_size from core. Please use sql_alchemy_pool_size from database instead.
• Removed deprecated configuration sql_alchemy_max_overflow from core. Please use sql_alchemy_max_overflow from database instead.
• Removed deprecated configuration sql_alchemy_pool_recycle from core. Please use sql_alchemy_pool_recycle from database instead.
• Removed deprecated configuration sql_alchemy_pool_pre_ping from core. Please use sql_alchemy_pool_pre_ping from database instead.
• Removed deprecated configuration sql_alchemy_schema from core. Please use sql_alchemy_schema from database instead.
• Removed deprecated configuration sql_alchemy_connect_args from core. Please use sql_alchemy_connect_args from database instead.
• Removed deprecated configuration load_default_connections from core. Please use load_default_connections from database instead.
• Removed deprecated configuration max_db_retries from core. Please use max_db_retries from database instead.