feat(neoverse_rd): deprecate and remove RD-N1-Edge platform variants

deprecate and remove support for RD-N1-Edge and RD-N1-Edgex2 platform
variants.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I59dce73b70014b3416d89b0d024d7204356b1b77
diff --git a/docs/plat/index.rst b/docs/plat/index.rst
index 715b488..87e6a92 100644
--- a/docs/plat/index.rst
+++ b/docs/plat/index.rst
@@ -64,7 +64,6 @@
    currently have associated documentation:
 
    - Arm Neoverse N1 System Development Platform (N1SDP)
-   - Arm Neoverse Reference Design N1 Edge (RD-N1-Edge) FVP
    - MediaTek MT8173 SoCs
 
 Deprecated platforms
@@ -82,6 +81,9 @@
 |    SGI-575     |      Arm       |        2.13        |         2.13       |
 |                |                |                    |                    |
 +----------------+----------------+--------------------+--------------------+
+|   RD-N1-Edge   |      Arm       |        2.13        |         2.13       |
+|                |                |                    |                    |
++----------------+----------------+--------------------+--------------------+
 
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