Remove old tool for Teensy 3.0 bootloader

tools/teensy-bootloader-mode.py

-#!/usr/bin/env python
-#
-# Find a Fadecandy device, and ask it to reboot back to the Teensy bootloader.
-#
-# Micah Elizabeth Scott
-# This example code is released into the public domain.
-#
-
-import usb.core
-
-dev = usb.core.find(idVendor=0x1d50, idProduct=0x607a)
-if not dev:
-    raise IOError("No Fadecandy interfaces found")
-
-dev.set_configuration()
-print "Serial number: %s" % usb.util.get_string(dev, 255, dev.iSerialNumber)
-dev.ctrl_transfer(0x40, 1)
-print "Rebooted."