Modify rsa_alt_helpers.h docs
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
diff --git a/library/rsa_alt_helpers.h b/library/rsa_alt_helpers.h
index 052b024..f234036 100644
--- a/library/rsa_alt_helpers.h
+++ b/library/rsa_alt_helpers.h
@@ -3,6 +3,12 @@
*
* \brief Context-independent RSA helper functions
*
+ * Please note: The below explanation is historical and is no longer relevant
+ * due to there being no compelling reason to keep these functions separate
+ * since the RSA alt interface was removed. A future refactoring will address
+ * this which is tracked by the following issue:
+ * https://github.com/Mbed-TLS/TF-PSA-Crypto/issues/105.
+ *
* This module declares some RSA-related helper functions useful when
* implementing the RSA interface. These functions are provided in a separate
* compilation unit in order to make it easy for designers of alternative RSA