Remove non-core fc

Change-Id: I3372997d86b009b48636f4de9c9f338ba0bbcd2b
diff --git a/Changes b/Changes
index 61aeaba..13d40fb 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,6 @@
-0.31 2017-06-29
+0.31 2017-06-30
         - Fixed exit codes in script.
+        - Use CORE::fc for case folding.
 
 0.30 2017-06-19
         - Fixed permission handling in test suite.