dt-bindings: iio: light: Drop BU27008 and BU27010

The ROHM BU27008 and BU27010 RGB sensors got cancelled. I was informed
they never reached mass production stage.

Keeping the bindings around is waste of maintenance resources. Drop the
bindings.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/3be66a8ec15fedd18ef13afae48ebb182196da13.1732819203.git.mazziesaccount@gmail.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>