Reduce code with no heated bed

Marlin/temperature.cpp

@@ -874,7 +874,7 @@ void Temperature::manage_heater() {
 
 // Derived from RepRap FiveD extruder::getTemperature()
 // For hot end temperature measurement.
-float Temperature::analog2temp(int raw, uint8_t e) {
+float Temperature::analog2temp(const int raw, const uint8_t e) {
   #if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
     if (e > HOTENDS)
   #else
@@ -915,9 +915,10 @@ float Temperature::analog2temp(int raw, uint8_t e) {
   return ((raw * ((5.0 * 100.0) / 1024.0) / OVERSAMPLENR) * (TEMP_SENSOR_AD595_GAIN)) + TEMP_SENSOR_AD595_OFFSET;
 }
 
-// Derived from RepRap FiveD extruder::getTemperature()
-// For bed temperature measurement.
-float Temperature::analog2tempBed(const int raw) {
+#if HAS_TEMP_BED
+  // Derived from RepRap FiveD extruder::getTemperature()
+  // For bed temperature measurement.
+  float Temperature::analog2tempBed(const int raw) {
     #if ENABLED(BED_USES_THERMISTOR)
       float celsius = 0;
       byte i;
@@ -947,7 +948,8 @@ float Temperature::analog2tempBed(const int raw) {
       return 0;
 
     #endif
-}
+  }
+#endif // HAS_TEMP_BED
 
 /**
  * Get the raw values into the actual temperatures.
@@ -1234,6 +1236,7 @@ void Temperature::init() {
     #endif // HOTENDS > 2
   #endif // HOTENDS > 1
 
+  #if HAS_TEMP_BED
     #ifdef BED_MINTEMP
       while (analog2tempBed(bed_minttemp_raw) < BED_MINTEMP) {
         #if HEATER_BED_RAW_LO_TEMP < HEATER_BED_RAW_HI_TEMP
@@ -1252,6 +1255,7 @@ void Temperature::init() {
         #endif
       }
     #endif // BED_MAXTEMP
+  #endif //HAS_TEMP_BED
 
   #if ENABLED(PROBING_HEATERS_OFF)
     paused = false;

Marlin/temperature.h

@@ -293,8 +293,11 @@ class Temperature {
     /**
      * Static (class) methods
      */
-    static float analog2temp(int raw, uint8_t e);
-    static float analog2tempBed(int raw);
+    static float analog2temp(const int raw, const uint8_t e);
+
+    #if HAS_TEMP_BED
+      static float analog2tempBed(const int raw);
+    #endif
 
     /**
      * Called from the Temperature ISR