Remove reference to Rational
diff --git a/Demo/classes/README b/Demo/classes/README
index 1d41f6a..e5bc289 100644
--- a/Demo/classes/README
+++ b/Demo/classes/README
@@ -4,7 +4,6 @@
Dates.py Date manipulation package by Tim Peters
Dbm.py Wrapper around built-in dbm, supporting arbitrary values
Range.py Example of a generator: re-implement built-in range()
-Rat.py Rational numbers
Rev.py Yield the reverse of a sequence
Vec.py A simple vector class
bitvec.py A bit-vector class by Jan-Hein B\"uhrman