diff --git a/keystone/common/utils.py b/keystone/common/utils.py
index 9e6d9e2f81..096e077b57 100644
--- a/keystone/common/utils.py
+++ b/keystone/common/utils.py
@@ -86,26 +86,6 @@ def flatten_dict(d, parent_key=''):
     return dict(items)
 
 
-def read_cached_file(filename, cache_info, reload_func=None):
-    """Read from a file if it has been modified.
-
-    :param cache_info: dictionary to hold opaque cache.
-    :param reload_func: optional function to be called with data when
-                        file is reloaded due to a modification.
-
-    :returns: data from file.
-
-    """
-    mtime = os.path.getmtime(filename)
-    if not cache_info or mtime != cache_info.get('mtime'):
-        with open(filename) as fap:
-            cache_info['data'] = fap.read()
-        cache_info['mtime'] = mtime
-        if reload_func:
-            reload_func(cache_info['data'])
-    return cache_info['data']
-
-
 class SmarterEncoder(jsonutils.json.JSONEncoder):
     """Help for JSON encoding dict-like objects."""