remove defensive row type check

Signed-off-by: varun-edachali-dbx <varun.edachali@databricks.com>

Author: varun-edachali-dbx

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

@@ -112,7 +112,6 @@ def filter_by_column_values(
             result_set,
             lambda row: (
                 len(row) > column_index
-                and isinstance(row[column_index], str)
                 and (
                     row[column_index].upper()
                     if not case_sensitive