Clean up watchdog impl.

Marlin/temperature.cpp

@@ -21,11 +21,13 @@
 #include "Marlin.h"
 #include "ultralcd.h"
 #include "temperature.h"
-#include "watchdog.h"
 #include "language.h"
-
 #include "Sd2PinMap.h"
 
+#if ENABLED(USE_WATCHDOG)
+  #include "watchdog.h"
+#endif
+
 //===========================================================================
 //================================== macros =================================
 //===========================================================================
@@ -819,8 +821,11 @@ static void updateTemperaturesFromRawValues() {
   #if HAS_FILAMENT_SENSOR
     filament_width_meas = analog2widthFil();
   #endif
-  //Reset the watchdog after we know we have a temperature measurement.
-  watchdog_reset();
+
+  #if ENABLED(USE_WATCHDOG)
+    // Reset the watchdog after we know we have a temperature measurement.
+    watchdog_reset();
+  #endif
 
   CRITICAL_SECTION_START;
   temp_meas_ready = false;