diff --git a/ebook_converter/polyglot/builtins.py b/ebook_converter/polyglot/builtins.py
index 0a82017..9ac26dd 100644
--- a/ebook_converter/polyglot/builtins.py
+++ b/ebook_converter/polyglot/builtins.py
@@ -13,18 +13,6 @@ def as_bytes(x, encoding='utf-8'):
     return str(x).encode(encoding)
 
 
-def reraise(tp, value, tb=None):
-    try:
-        if value is None:
-            value = tp()
-        if value.__traceback__ is not tb:
-            raise value.with_traceback(tb)
-        raise value
-    finally:
-        value = None
-        tb = None
-
-
 def error_message(exc):
     args = getattr(exc, 'args', None)
     if args and isinstance(args[0], str):