diff --git a/openstackclient/common/utils.py b/openstackclient/common/utils.py
index 42630d913a..deab3a0725 100644
--- a/openstackclient/common/utils.py
+++ b/openstackclient/common/utils.py
@@ -258,10 +258,6 @@ def sort_items(items, sort_str):
     return items
 
 
-def string_to_bool(arg):
-    return arg.strip().lower() in ('t', 'true', 'yes', '1')
-
-
 def env(*vars, **kwargs):
     """Search for the first defined of possibly many env vars