Delete copypasta from sodium_crypto_kdf_derive_from_key
Delete copypasta from sodium_crypto_kdf_derive_from_key

ctx and key lengths are already checked, and message doesn't match the check
paragonie/libsodium-php,paragonie/libsodium-php,paragonie/libsodium-php,jedisct1/libsodium-php,jedisct1/libsodium-php,jedisct1/libsodium-php