docs(context-mgmt): remove redundant information

The details specified under "Design" section with regard to
enhancing the context_management library specifies the information
on introducing root_context.

This design has been through several discussions and based on its
outcome, library has been enhanced.

The updated information covering all the aspects with regard to
implementation is listed under "Components" section.
https://trustedfirmware-a.readthedocs.io/en/latest/components/context-management-library.html

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: I2cf3ccd8cd94444b90fdc627f45a72a4b6096638
diff --git a/docs/design_documents/index.rst b/docs/design_documents/index.rst
index ac982e0..f1d8386 100644
--- a/docs/design_documents/index.rst
+++ b/docs/design_documents/index.rst
@@ -6,7 +6,6 @@
    :caption: Contents
 
    cmake_framework
-   context_mgmt_rework
    measured_boot_poc
    drtm_poc
    rse
@@ -15,4 +14,4 @@
 
 --------------
 
-*Copyright (c) 2020-2022, Arm Limited and Contributors. All rights reserved.*
+*Copyright (c) 2020-2025, Arm Limited and Contributors. All rights reserved.*