Revert "Update stage.sql, add default ldts value"

Author: tkirschke

macros/staging/stage.sql

@@ -109,11 +109,6 @@
       {%- set include_source_columns = true -%}
     {%- endif -%}
 
-    {# If ldts is empty replace it with the current timestamp #}
-    {%- if datavault4dbt.is_nothing(ldts) -%}
-      {%- set ldts = datavault4dbt.current_timestamp() -%}
-    {%- endif -%}
-    
     {{- adapter.dispatch('stage', 'datavault4dbt')(include_source_columns=include_source_columns,
                                         ldts=ldts,
                                         rsrc=rsrc,