fix removed alias

Author: sfc-gh-joshi

src/snowflake/snowpark/dataframe.py

@@ -293,12 +293,8 @@ def _alias_if_needed(
             )
         return col.alias(f'"{prefix}{unquoted_col_name}"')
     else:
-        # No alias needed when source name equals destination name.
-        # Populate expr_to_alias directly instead of creating redundant Alias expression.
-        # This avoids generating "A" AS "A" in SQL while still maintaining column tracking.
-        quoted_name = quote_name(unquoted_col_name)
-        df._plan.expr_to_alias[col._expression.expr_id] = quoted_name
-        return col
+        # Removal of redundant aliases (like `"A" AS "A"`) is handled at the analyzer level.
+        return col.alias(f'"{unquoted_col_name}"')
 
 
 def _populate_expr_to_alias(df: "DataFrame") -> None: