Revert "dt-bindings: Add LEGO MINDSTORMS EV3 compatible specification"

This reverts commit 852bf68b.

As Ben pointed out, these drivers don't exist in <=4.9.

Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>