Easier to disable homing validation (#11458)

Marlin/src/module/endstops.cpp

@@ -256,11 +256,13 @@ void Endstops::not_homing() {
   #endif
 }
 
-// If the last move failed to trigger an endstop, call kill
-void Endstops::validate_homing_move() {
-  if (trigger_state()) hit_on_purpose();
-  else kill(PSTR(MSG_ERR_HOMING_FAILED));
-}
+#if ENABLED(VALIDATE_HOMING_ENDSTOPS)
+  // If the last move failed to trigger an endstop, call kill
+  void Endstops::validate_homing_move() {
+    if (trigger_state()) hit_on_purpose();
+    else kill(PSTR(MSG_ERR_HOMING_FAILED));
+  }
+#endif
 
 // Enable / disable endstop z-probe checking
 #if HAS_BED_PROBE