hw/core/machine: Remove the hw_compat_3_0[] array

The hw_compat_3_0[] array was only used by the pc-q35-3.0
and pc-i440fx-3.0 machines, which got removed. Remove it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20260307150042.78030-5-philmd@linaro.org>

hw/core/machine.c

@@ -238,9 +238,6 @@ GlobalProperty hw_compat_3_1[] = {
 };
 const size_t hw_compat_3_1_len = G_N_ELEMENTS(hw_compat_3_1);
 
-GlobalProperty hw_compat_3_0[] = {};
-const size_t hw_compat_3_0_len = G_N_ELEMENTS(hw_compat_3_0);
-
 MachineState *current_machine;
 
 static char *machine_get_kernel(Object *obj, Error **errp)

include/hw/core/boards.h

@@ -871,7 +871,4 @@ extern const size_t hw_compat_4_0_len;
 extern GlobalProperty hw_compat_3_1[];
 extern const size_t hw_compat_3_1_len;
 
-extern GlobalProperty hw_compat_3_0[];
-extern const size_t hw_compat_3_0_len;
-
 #endif