docs: Document removal of old Arm boards

Now we have removed all the board types that it covers, we can move
the text about old Arm boards from deprecated.rst to
removed-features.rst, tweaking it appropriately.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240903160751.4100218-37-peter.maydell@linaro.org

docs/about/deprecated.rst

@@ -251,21 +251,6 @@ to correct issues, mostly regarding migration compatibility. These are
 no longer maintained and removing them will make the code easier to
 read and maintain. Use versions 3.0 and above as a replacement.
 
-Arm machines ``akita``, ``borzoi``, ``cheetah``, ``connex``, ``mainstone``, ``n800``, ``n810``, ``spitz``, ``terrier``, ``tosa``, ``verdex``, ``z2`` (since 9.0)
-''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
-
-QEMU includes models of some machine types where the QEMU code that
-emulates their SoCs is very old and unmaintained. This code is now
-blocking our ability to move forward with various changes across
-the codebase, and over many years nobody has been interested in
-trying to modernise it. We don't expect any of these machines to have
-a large number of users, because they're all modelling hardware that
-has now passed away into history. We are therefore dropping support
-for all machine types using the PXA2xx and OMAP2 SoCs. We are also
-dropping the ``cheetah`` OMAP1 board, because we don't have any
-test images for it and don't know of anybody who does; the ``sx1``
-and ``sx1-v1`` OMAP1 machines remain supported for now.
-
 PPC 405 ``ref405ep`` machine (since 9.1)
 ''''''''''''''''''''''''''''''''''''''''
 

docs/about/removed-features.rst

@@ -998,6 +998,20 @@ The Nios II architecture was orphan.
 
 The machine was unmaintained.
 
+Arm machines ``akita``, ``borzoi``, ``cheetah``, ``connex``, ``mainstone``, ``n800``, ``n810``, ``spitz``, ``terrier``, ``tosa``, ``verdex``, ``z2`` (removed in 9.2)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+QEMU included models of some machine types where the QEMU code that
+emulates their SoCs was very old and unmaintained. This code was
+blocking our ability to move forward with various changes across
+the codebase, and over many years nobody has been interested in
+trying to modernise it. We don't expect any of these machines to have
+a large number of users, because they're all modelling hardware that
+has now passed away into history. We are therefore dropping support
+for all machine types using the PXA2xx and OMAP2 SoCs. We are also
+dropping the ``cheetah`` OMAP1 board, because we don't have any
+test images for it and don't know of anybody who does.
+
 linux-user mode CPUs
 --------------------