ath79: Remove redundant LED GPIO definitions for Archer C25 v1

Signed-off-by: Adrian Schmutzler <[email protected]>

target/linux/ath79/dts/qca9561_tplink_archer-c25-v1.dts

@@ -24,10 +24,6 @@
 		cs-gpios = <&gpio 16 GPIO_ACTIVE_HIGH>;
 		num-chipselects = <1>;
 
-		/* can be removed on 4.19 */
-		gpio-sck = <&gpio 15 GPIO_ACTIVE_HIGH>;
-		gpio-mosi = <&gpio 14 GPIO_ACTIVE_HIGH>;
-
 		led_gpio: led_gpio@0 {
 			compatible = "fairchild,74hc595";
 			reg = <0>;