Remove redundant model PII tag checking logic

- Remove model-level PII tag checking from get_pii_columns_from_parent_model
- This logic is handled elsewhere as noted by Yosef
- Simplifies macro to focus only on column-level PII detection

Co-Authored-By: Yosef Arbiv <[email protected]>

Author: devin-ai-integration[bot]

macros/edr/system/system_utils/get_pii_columns_from_parent_model.sql

@@ -35,33 +35,7 @@
     {% set pii_tags = (raw_pii_tags or []) | map('lower') | list %}
   {% endif %}
 
-  {# Check if the model itself has PII tags - if so, all columns are considered PII #}
-  {% set _model_tags_sources = [
-    parent_model.get('tags', []),
-    parent_model.get('config', {}).get('tags', []),
-    parent_model.get('meta', {}).get('tags', [])
-  ] %}
-  {% set all_model_tags = [] %}
-  {% for src in _model_tags_sources %}
-    {% set tags_list = src if src is iterable and not (src is string) else [src] %}
-    {% do all_model_tags.extend(tags_list) %}
-  {% endfor %}
-  {% set all_model_tags = all_model_tags | map('lower') | unique | list %}
-  
-  {% for pii_tag in pii_tags %}
-    {% if pii_tag in all_model_tags %}
-      {# Model has PII tag, return all column names #}
-      {% set column_nodes = parent_model.get("columns") %}
-      {% if column_nodes %}
-        {% for column_node in column_nodes.values() %}
-          {% do pii_columns.append(column_node.get('name')) %}
-        {% endfor %}
-      {% endif %}
-      {% do return(pii_columns) %}
-    {% endif %}
-  {% endfor %}
-  
-  {# Model doesn't have PII tags, check individual columns #}
+  {# Check individual columns for PII tags #}
   {% set column_nodes = parent_model.get("columns") %}
   {% if not column_nodes %}
     {% do return(pii_columns) %}