iio: max44000: remove unused variable max44000_alstim_shift

Variable max44000_alstim_shift is defined but is never used hence it is
redundant and can be removed. This variable has been like this since
the driver was added back in 2016.

Cleans up clang warning:
warning: 'max44000_alstim_shift' defined but not used [-Wunused-const-variable=]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/light/max44000.c

@@ -99,7 +99,6 @@ static const int max44000_alspga_shift[] = {0, 2, 4, 7};
  * Handling this internally is also required for buffer support because the
  * channel's scan_type can't be modified dynamically.
  */
-static const int max44000_alstim_shift[] = {0, 2, 4, 6};
 #define MAX44000_ALSTIM_SHIFT(alstim) (2 * (alstim))
 
 /* Available integration times with pretty manual alignment: */