misc: Remove old APDS990x driver

misc: Remove old APDS990x driver

The APDS990x driver in misc lacks DeviceTree support, and no mainline
pre-DT board files configured this device using apds990x_platform_data.

This driver belongs to a legacy group of ambient light sensor drivers in
drivers/misc/ that predates the migration to DT and the standard IIO ABI.

Since the Avago APDS9900/9901 ALS/Proximity sensor is now supported by
the tsl2772 IIO driver and there are no active users in the kernel tree,
remove this old implementation.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>