Clean up: remove old src/utils files (moved to preprocess)

src/utils/__init__.py

@@ -1 +0,0 @@
-"""Utility functions and classes for the supply roster tool."""

src/utils/file_utils.py

@@ -1,21 +0,0 @@
-import os
-
-
-def save_dataframes(dataframes, target, save_path):
-    """
-    Save pandas DataFrames to CSV files.
-
-    Args:
-        dataframes (dict): Dictionary mapping dataset names to DataFrames
-        target (str): Target dataset name to save, or 'all' to save all
-        save_path (str): Path to save the CSV files
-    """
-    os.makedirs(save_path, exist_ok=True)
-
-    if target == "all":
-        for name, df in dataframes.items():
-            df.to_csv(os.path.join(save_path, f"{name}.csv"), index=False)
-    elif target in dataframes:
-        dataframes[target].to_csv(os.path.join(save_path, f"{target}.csv"), index=False)
-    else:
-        raise ValueError(f"Unknown target: {target}")