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