Revert "USBDevice: interrupts are now enabled on init"

This reverts commit a8d208a.

Fixes arduino#423 on Linux/Mac (and Windows when Arduino standard drivers are uninstalled)

Fix for normal behaviour on Windows is ongoing

Author: facchinm

cores/arduino/USB/CDC.cpp

@@ -139,6 +139,16 @@ bool CDC_Setup(USBSetup &setup)
 	return false;
 }
 
+/*
+Serial_::Serial_(USBDeviceClass &_usb) : PluggableUSBModule(3, 2, epType), usb(_usb), stalled(false)
+{
+  epType[0] = USB_ENDPOINT_TYPE_INTERRUPT | USB_ENDPOINT_IN(0);
+  epType[1] = USB_ENDPOINT_TYPE_BULK | USB_ENDPOINT_OUT(0);
+  epType[2] = USB_ENDPOINT_TYPE_BULK | USB_ENDPOINT_IN(0);
+  PluggableUSB().plug(this);
+}
+*/
+
 void Serial_::begin(uint32_t /* baud_count */)
 {
 	// uart config is ignored in USB-CDC

cores/arduino/USB/USBCore.cpp

@@ -525,10 +525,6 @@ void USBDeviceClass::initEP(uint32_t ep, uint32_t config)
 	{
 		usbd.epBank1SetSize(ep, 64);
 		usbd.epBank1SetAddress(ep, &udd_ep_in_cache_buffer[ep]);
-
-		// NAK on endpoint IN, the bank is not yet filled in.
-		usbd.epBank1ResetReady(ep);
-
 		usbd.epBank1SetType(ep, 3); // BULK IN
 	}
 	else if (config == USB_ENDPOINT_TYPE_CONTROL)