docs(changelog): remove RD-E1-Edge platform's scope

As RD-E1-Edge platform has been deprecated and removed, remove the scope
used by the platform from changelog.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: Ib3706cd76ae1d8d05f37794629739a687ed26b9a
diff --git a/changelog.yaml b/changelog.yaml
index 02c893d..6e7f179 100644
--- a/changelog.yaml
+++ b/changelog.yaml
@@ -186,9 +186,6 @@
             scope: neoverse-rd
 
             subsections:
-              - title: RD-E1-Edge
-                scope: rde1edge
-
               - title: RD-N2
                 scope: rdn2