staging: iio: Remove TODO file

Remove TODO file, as it only contains contact information.

Signed-off-by: Dominik Karol Piątkowski <[email protected]>
Acked-by: Jonathan Cameron <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Kotbenek