Remove unnecessary fill(0) before drop

[asmodehn]

This is rust, it is perfectly safe to drop the memory directly, no point to fill(0) before:

• https://doc.rust-lang.org/stable/reference/types/array.html#r-type.array.index

All elements of arrays are always initialized, and access to an array is always bounds-checked in safe methods and operators.

• https://doc.rust-lang.org/std/vec/struct.Vec.html#guarantees

Do not rely on removed data to be erased for security purposes. Even if you drop a Vec, its buffer may simply be reused by another allocation. Even if you zero a Vec’s memory first, that might not actually happen because the optimizer does not consider this a side-effect that must be preserved.

[SudoDios]

Hi @asmodehn
Thank you