init: remove duplicate code

API z_device_state_init has already defined in device.c

Signed-off-by: liuqian.andy <liuqian.andyl@picoheart.com>

Author: liuqian.andy

kernel/init.c

@@ -192,19 +192,7 @@ bool z_sys_post_kernel;
 
 /* defined in device.c */
 extern int do_device_init(const struct device *dev);
-
-/**
- * @brief Initialize state for all static devices.
- *
- * The state object is always zero-initialized, but this may not be
- * sufficient.
- */
-static void z_device_state_init(void)
-{
-	STRUCT_SECTION_FOREACH(device, dev) {
-		k_object_init(dev);
-	}
-}
+extern void z_device_state_init(void);
 
 /**
  * @brief Execute all the init entry initialization functions at a given level