Drop C-style 'void' argument

Marlin/src/feature/dac/dac_dac084s085.h

@@ -24,7 +24,7 @@
 class dac084s085 {
   public:
     dac084s085();
-    static void begin(void);
+    static void begin();
     static void setValue(const uint8_t channel, const uint8_t value);
   private:
     static void cshigh();