Move pins / Arduino includes to MarlinConfig.h

Marlin/Conditionals_post.h

  * Defines that depend on configuration but are not editable.
  */
 
-
-  #include "pins.h"
-
-  #ifndef USBCON
-    #define HardwareSerial_h // trick to disable the standard HWserial
-  #endif
-  #include "Arduino.h"
-
-  #include "macros.h"
 #ifndef CONDITIONALS_POST_H
 #define CONDITIONALS_POST_H
 

Marlin/MarlinConfig.h

 #include "Configuration.h"
 #include "Conditionals_LCD.h"
 #include "Configuration_adv.h"
+#include "pins.h"
+#ifndef USBCON
+  #define HardwareSerial_h // trick to disable the standard HWserial
+#endif
+#include "Arduino.h"
 #include "Conditionals_post.h"
 #include "SanityCheck.h"