Remove makefile entries for removed overlays

Author: ngwese

arch/arm/boot/dts/overlays/Makefile

@@ -192,10 +192,8 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	mira220.dtbo \
 	mlx90640.dtbo \
 	mmc.dtbo \
-	monome-snd.dtbo \
 	monome-snd-4270.dtbo \
 	monome-snd-4271.dtbo \
-	mpu6050.dtbo \
 	mz61581.dtbo \
 	norns-buttons-encoders.dtbo \
 	ov2311.dtbo \