feat(sgi575): remove SGI-575 from deprecated list

As SGI-575 is not planned to be deprecated in the upcoming release
cycles, remove it from the deprecated list.

Change-Id: Ic9171a3e1bec198d9305e75ac5cae4b40498537e
Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
diff --git a/docs/plat/index.rst b/docs/plat/index.rst
index 12afa44..5231407 100644
--- a/docs/plat/index.rst
+++ b/docs/plat/index.rst
@@ -70,8 +70,6 @@
 +----------------+----------------+--------------------+--------------------+
 |    Platform    |     Vendor     | Deprecated version |  Deleted version   |
 +================+================+====================+====================+
-|    sgi575      |      Arm       |        2.8         |       TBD          |
-+----------------+----------------+--------------------+--------------------+
 |    rdn1edge    |      Arm       |        2.8         |       TBD          |
 +----------------+----------------+--------------------+--------------------+
 
diff --git a/plat/arm/board/neoverse_rd/platform/sgi575/platform.mk b/plat/arm/board/neoverse_rd/platform/sgi575/platform.mk
index e51014b..37306be 100644
--- a/plat/arm/board/neoverse_rd/platform/sgi575/platform.mk
+++ b/plat/arm/board/neoverse_rd/platform/sgi575/platform.mk
@@ -4,8 +4,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-$(warning Platform ${PLAT} is deprecated. Some of the features might not work as expected)
-
 include plat/arm/board/neoverse_rd/common/nrd-common.mk
 
 SGI575_BASE		=	plat/arm/board/neoverse_rd/platform/sgi575