overlays: Delete deprecated overlay mpu6050

The mpu6050 overlay has been deprecated for a year (when we were still
shipping rpi-5.15.y). Delete it.

Signed-off-by: Phil Elwell <[email protected]>

Author: pelwell

arch/arm/boot/dts/overlays/Makefile

@@ -174,7 +174,6 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	mipi-dbi-spi.dtbo \
 	mlx90640.dtbo \
 	mmc.dtbo \
-	mpu6050.dtbo \
 	mz61581.dtbo \
 	ov2311.dtbo \
 	ov5647.dtbo \