Remove pointless debug_assert

src/pbkdf2.rs

@@ -88,8 +88,6 @@ fn create_hmac_engine(mnemonic: &[&'static str]) -> hmac::HmacEngine<sha512::Has
 // Method borrowed from rust-bitcoin's endian module.
 #[inline]
 fn u32_to_array_be(val: u32) -> [u8; 4] {
-	debug_assert_eq!(::core::mem::size_of::<u32>(), 4); // size_of isn't a constfn in 1.22
-
 	let mut res = [0; 4];
 	for i in 0..4 {
 		res[i] = ((val >> (4 - i - 1)*8) & 0xff) as u8;