target/m68k: Remove `NB_MMU_MODES` define

Signed-off-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230306175230.7110-11-anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/m68k/cpu-param.h

@@ -17,6 +17,5 @@
 #define TARGET_PAGE_BITS 12
 #define TARGET_PHYS_ADDR_SPACE_BITS 32
 #define TARGET_VIRT_ADDR_SPACE_BITS 32
-#define NB_MMU_MODES 2
 
 #endif