feat(rdn1edge): remove RD-N1-Edge from deprecated list

As RD-N1-Edge is not planned to be deprecated in the upcoming release
cycles, remove it from the deprecated list.

Change-Id: I6af06e7bd162747aab72384185951d218b388ed3
Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
diff --git a/docs/plat/index.rst b/docs/plat/index.rst
index 5231407..702726e 100644
--- a/docs/plat/index.rst
+++ b/docs/plat/index.rst
@@ -70,7 +70,8 @@
 +----------------+----------------+--------------------+--------------------+
 |    Platform    |     Vendor     | Deprecated version |  Deleted version   |
 +================+================+====================+====================+
-|    rdn1edge    |      Arm       |        2.8         |       TBD          |
+| None at this   |                |                    |                    |
+| time.          |                |                    |                    |
 +----------------+----------------+--------------------+--------------------+
 
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