Don't use naked attribute on startup code

teensy4/startup.c

 void startup_early_hook(void)		__attribute__ ((weak, alias("startup_default_early_hook")));
 void startup_default_late_hook(void) {}
 void startup_late_hook(void)		__attribute__ ((weak, alias("startup_default_late_hook")));
-__attribute__((section(".startup"), optimize("no-tree-loop-distribute-patterns"), naked))
+__attribute__((section(".startup"), optimize("no-tree-loop-distribute-patterns")))
 void ResetHandler(void)
 {
 	unsigned int i;
 	set_arm_clock(F_CPU);
 #endif
 
-	asm volatile("nop\n nop\n nop\n nop": : :"memory"); // why oh why?
-
 	// Undo PIT timer usage by ROM startup
 	CCM_CCGR1 |= CCM_CCGR1_PIT(CCM_CCGR_ON);
 	PIT_MCR = 0;