Remove obsolete macros from compat-1.3.h

ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 0f7bae5..7a88f2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 mbed TLS ChangeLog (Sorted per branch, date)
 
+= mbed TLS 2.x.x branch released xxxx-xx-xx
+
+Bugfix
+   * Remove macros from compat-1.3.h that correspond to deleted items from most
+     recent versions of the library. Found by Kyle Keen.
+
 = mbed TLS 2.4.2 branch released 2017-03-08
 
 Security