Fix ChangeLog for backport of IOTSSL-621
diff --git a/ChangeLog b/ChangeLog
index e2adc07..6e171f1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,10 +11,6 @@
    * Fix potential integer overflow to buffer overflow in
      mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt
 
-Security
-   * Fix potential integer overflow to buffer overflow in
-     mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt
-
 Bugfix
    * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three
      arguments where the same (in-place doubling). Found and fixed by Janos