SIMPLELINK-CC2640R2-SDK: "Using cache as ram" documentation in CC2640R2-SDK 4_40_00_10

Part Number: SIMPLELINK-CC2640R2-SDK

Hi guys.

In version of the SIMPLELINK-CC2640R2 I can to find the documentation about "Using cache as ram " on the link 

However I am not able to find this documentation in the version 4_40_00_10.
Why was "Using cache as ram" documentation removed?

Thank you in advanced.