ARM: shmobile: Remove obsolete legacy PM Domain leftovers

The last users were removed in commit b5872880 ("ARM: shmobile:
R-Mobile: Remove legacy PM Domain code").
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/pm-rmobile.h

@@ -12,10 +12,6 @@
 
 #include <linux/pm_domain.h>
 
-#define DEFAULT_DEV_LATENCY_NS	250000
-
-struct platform_device;
-
 struct rmobile_pm_domain {
 	struct generic_pm_domain genpd;
 	struct dev_power_governor *gov;
@@ -26,9 +22,4 @@ struct rmobile_pm_domain {
 	bool no_debug;
 };
 
-struct pm_domain_device {
-	const char *domain_name;
-	struct platform_device *pdev;
-};
-
 #endif /* PM_RMOBILE_H */