Update overview.mdx

Author: gfletcher-cll

src/content/ccip/concepts/architecture/offchain/overview.mdx

@@ -17,7 +17,6 @@ import { ClickToZoom } from "@components"
 CCIP's offchain architecture includes the following:
 
 - **Decentralized Oracle Networks (DONs)**: Running offchain consensus using the Offchain Reporting Protocol (OCR).
-- **Risk Management Network (RMN)**: Enhancing security through a defense-in-depth design.
 - **Interaction Components**: Managing communication between the CCIP DONs and the RMN.
 
 ## Components