qemu/processor: Remove unused 'qemu/atomic.h' header

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230828221314.18435-11-philmd@linaro.org>

include/qemu/processor.h

@@ -7,8 +7,6 @@
 #ifndef QEMU_PROCESSOR_H
 #define QEMU_PROCESSOR_H
 
-#include "qemu/atomic.h"
-
 #if defined(__i386__) || defined(__x86_64__)
 # define cpu_relax() asm volatile("rep; nop" ::: "memory")