dt/bindings: arm-boards: Remove skeleton.dtsi inclusion from example

As of commit 9c0da3cc61f1233c ("ARM: dts: explicitly mark skeleton.dtsi
as deprecated"), including skeleton.dtsi is deprecated.
Hence remove it from the example.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Mark Rutland <[e-mail]>
Reviewed-by: Javier Martinez Canillas <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/arm/arm-boards

···
 
 /dts-v1/;
 #include <dt-bindings/interrupt-controller/irq.h>
-#include "skeleton.dtsi"
 
 / {
 	model = "ARM RealView PB1176 with device tree";
 	compatible = "arm,realview-pb1176";
+	#address-cells = <1>;
+	#size-cells = <1>;
 
 	soc {
 		#address-cells = <1>;