This command deletes a range of values within given array and shifts remaining
values to fill the deletion gap.
Important: Currently (r14395) the command uses [Getarraysize]
internally, which leads to unpredictable results with arrays, that contain
empty elements. It is recommended to use a combination of [Copyarray] and
[Cleararray] instead.
**deletearray** @array, 10;
Deletes the first 10 elements of the array and shifts all other values by one
to the left.
[Copyarray] @array[0], @array[10], 90;
[Cleararray] @array[90], 0, 10;
Assuming @array has 100 elements, this achieves the same effect as the
example above, but works properly even if @array has empty element(s).