hw/arm/virt: Remove deprecated virt-4.0 machine

This machine has been supported for a period of more than 6 years.
According to our versioned machine support policy (see commit
ce80c4fa6f "docs: document special exception for machine type
deprecation & removal") it can now be removed.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250429153907.31866-5-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/virt.c

@@ -3562,10 +3562,3 @@ static void virt_machine_4_1_options(MachineClass *mc)
     mc->auto_enable_numa_with_memhp = false;
 }
 DEFINE_VIRT_MACHINE(4, 1)
-
-static void virt_machine_4_0_options(MachineClass *mc)
-{
-    virt_machine_4_1_options(mc);
-    compat_props_add(mc->compat_props, hw_compat_4_0, hw_compat_4_0_len);
-}
-DEFINE_VIRT_MACHINE(4, 0)