Drop C-style 'void' argument

Marlin/src/HAL/HAL_STM32F1/watchdog.cpp

@@ -40,7 +40,7 @@ void watchdog_reset() {
   iwdg_feed();
 }
 
-void watchdogSetup(void) {
+void watchdogSetup() {
   // do whatever. don't remove this function.
 }
 
@@ -51,7 +51,7 @@ void watchdogSetup(void) {
  *
  * @details The watchdog clock is 40Khz. We need a 4 seconds interval, so use a /256 preescaler and 625 reload value (counts down to 0)
  */
-void watchdog_init(void) {
+void watchdog_init() {
   //iwdg_init(IWDG_PRE_256, STM32F1_WD_RELOAD);
 }