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>

Documentation/devicetree/bindings/arm/davinci.txt

@@ -13,10 +13,6 @@ EnBW AM1808 based CMC board
 Required root node properties:
     - compatible = "enbw,cmc", "ti,da850;
 
-LEGO MINDSTORMS EV3 (AM1808 based)
-Required root node properties:
-    - compatible = "lego,ev3", "ti,da850";
-
 Generic DaVinci Boards
 ----------------------