THERMAL_PROTECTION_GRACE_PERIOD is obsolete (#14798)

Marlin/src/Marlin.cpp

@@ -1137,6 +1137,8 @@ void loop() {
 
   for (;;) {
 
+    idle(); // Do an idle first so boot is slightly faster
+
     #if ENABLED(SDSUPPORT)
 
       card.checkautostart();
@@ -1168,6 +1170,5 @@ void loop() {
     if (queue.length < BUFSIZE) queue.get_available_commands();
     queue.advance();
     endstops.event_handler();
-    idle();
   }
 }