diff --git a/common/string_helpers.py b/common/string_helpers.py
deleted file mode 100644
index 3038605fbb..0000000000
--- a/common/string_helpers.py
+++ /dev/null
@@ -1,6 +0,0 @@
-def replace_right(s, old, new, occurrence):
-  # replace_right('1232425', '2', ' ', 1) -> '12324 5'
-  # replace_right('1232425', '2', ' ', 2) -> '123 4 5'
-
-  split = s.rsplit(old, occurrence)
-  return new.join(split)