* Remove the unnecessary mask, since `ZSTD_hash*()` already ensures the output is mod 2^h. * Dedup the hash functions and use `ZSTD_hash*()` directly.
* Remove the unnecessary mask, since `ZSTD_hash*()` already ensures the output is mod 2^h. * Dedup the hash functions and use `ZSTD_hash*()` directly.