Revert "init col normalisation"

This reverts commit ad52ed4.

Author: varun-edachali-dbx

src/databricks/sql/backend/sea/backend.py

@@ -694,14 +694,6 @@ def get_catalogs(
             enforce_embedded_schema_correctness=False,
         )
         assert result is not None, "execute_command returned None in synchronous mode"
-
-        # Normalize column names to match JDBC/thrift backend
-        from .metadata_constants import CATALOG_COLUMNS, normalize_metadata_description
-
-        result.description = normalize_metadata_description(
-            result.description, CATALOG_COLUMNS
-        )
-
         return result
 
     def get_schemas(
@@ -735,14 +727,6 @@ def get_schemas(
             enforce_embedded_schema_correctness=False,
         )
         assert result is not None, "execute_command returned None in synchronous mode"
-
-        # Normalize column names to match JDBC/thrift backend
-        from .metadata_constants import SCHEMA_COLUMNS, normalize_metadata_description
-
-        result.description = normalize_metadata_description(
-            result.description, SCHEMA_COLUMNS
-        )
-
         return result
 
     def get_tables(
@@ -785,13 +769,6 @@ def get_tables(
         )
         assert result is not None, "execute_command returned None in synchronous mode"
 
-        # Normalize column names to match JDBC/thrift backend
-        from .metadata_constants import TABLE_COLUMNS, normalize_metadata_description
-
-        result.description = normalize_metadata_description(
-            result.description, TABLE_COLUMNS
-        )
-
         # Apply client-side filtering by table_types
         from databricks.sql.backend.sea.utils.filters import ResultSetFilter
 
@@ -838,10 +815,4 @@ def get_columns(
             enforce_embedded_schema_correctness=False,
         )
         assert result is not None, "execute_command returned None in synchronous mode"
-
-        # Normalize column names to match JDBC/thrift backend
-        from .metadata_constants import normalize_columns_metadata_description
-
-        result.description = normalize_columns_metadata_description(result.description)
-
         return result