Don't disturb pin 13 (leftover debugging code)

teensy4/startup.c

 	//__asm__ volatile("mov sp, %0" : : "r" (0x20010000) : );
 
 	// pin 13 - if startup crashes, use this to turn on the LED early for troubleshooting
-	IOMUXC_SW_MUX_CTL_PAD_GPIO_B0_03 = 5;
-	IOMUXC_SW_PAD_CTL_PAD_GPIO_B0_03 = IOMUXC_PAD_DSE(7);
-	GPIO2_GDIR |= (1<<3);
-	GPIO2_DR_SET = (1<<3);
+	//IOMUXC_SW_MUX_CTL_PAD_GPIO_B0_03 = 5;
+	//IOMUXC_SW_PAD_CTL_PAD_GPIO_B0_03 = IOMUXC_PAD_DSE(7);
+	//GPIO2_GDIR |= (1<<3);
+	//GPIO2_DR_SET = (1<<3); // digitalWrite(13, HIGH);
 
 	// Initialize memory
 	memory_copy(&_stext, &_stextload, &_etext);

teensy4/usb_serial.c

 	// TODO: do something so much better that this quick hack....
 	if (size > sizeof(txbuffer)) size = sizeof(txbuffer);
 	int count=0;
-	digitalWriteFast(13, HIGH);
+	//digitalWriteFast(13, HIGH);
 	while (1) {
 		uint32_t status = (volatile)(transfer.status);
 		if (count > 10) printf("status = %x\n", status);
 		// TODO: check for USB offline
 		delayMicroseconds(5); // polling too quickly seem to block DMA - maybe DTCM issue?
 	}
-	digitalWriteFast(13, LOW);
+	//digitalWriteFast(13, LOW);
 	delayMicroseconds(1); // TODO: this must not be the answer!
 	memcpy(txbuffer, buffer, size);
 	usb_prepare_transfer(&transfer, txbuffer, size, 0);