Revert of Update device/usb and its Mojo interface for variable size ISO packets.

device/devices_app/usb/type_converters.cc

Index: device/devices_app/usb/type_converters.cc
diff --git a/device/devices_app/usb/type_converters.cc b/device/devices_app/usb/type_converters.cc
index 709b0ca3621dcfe8514686b43bc230d1c20c1b04..e7b2ea627dc6201fab0971c0f9ee232392fae4f6 100644
--- a/device/devices_app/usb/type_converters.cc
+++ b/device/devices_app/usb/type_converters.cc
@@ -267,17 +267,4 @@
   return info;
 }
 
-// static
-device::usb::IsochronousPacketPtr
-TypeConverter<device::usb::IsochronousPacketPtr,
-              device::UsbDeviceHandle::IsochronousPacket>::
-    Convert(const device::UsbDeviceHandle::IsochronousPacket& packet) {
-  device::usb::IsochronousPacketPtr info =
-      device::usb::IsochronousPacket::New();
-  info->length = packet.length;
-  info->transferred_length = packet.transferred_length;
-  info->status = mojo::ConvertTo<device::usb::TransferStatus>(packet.status);
-  return info;
-}
-
 }  // namespace mojo