Remove UNUSED macro

Use variables named unused instead which is simpler

components/temperature.c

@@ -21,14 +21,12 @@
 	#include <sys/sysctl.h>
 
 	const char *
-	temp(const char *file)
+	temp(const char *unused)
 	{
 		int mib[5];
 		size_t size;
 		struct sensor temp;
 
-		UNUSED(file); /* no temperature file on OpenBSD */
-
 		mib[0] = CTL_HW;
 		mib[1] = HW_SENSORS;
 		mib[2] = 0; /* cpu0 */