releasetools: don't assert device

  def AssertDevice(self, device):

    """Assert that the device identifier is the given string."""

    cmd = ('assert(' +

           ' || \0'.join(['getprop("ro.product.device") == "%s" || getprop("ro.build.product") == "%s"'

                         % (i, i) for i in device.split(",")]) +

           ' || abort("E%d: This package is for device: %s; ' +

           'this device is " + getprop("ro.product.device") + ".");' +

           ');') % (common.ErrorCode.DEVICE_MISMATCH, device)

    self.script.append(self.WordWrap(cmd))

    pass

  def AssertSomeBootloader(self, *bootloaders):

    """Assert that the bootloader version is one of *bootloaders."""