remove redunant todo regarding mac address init

the from_bytes_unchecked function copies 6 bytes into a new
slice of bytes that is then used as the mac address.
the comment highlighted that the second array memory
initialization should be removed somehow, but the compiler
already optimized it away

Signed-off-by: aerosouund <[email protected]>

Author: aerosouund

src/vmm/src/utils/net/mac.rs

@@ -84,8 +84,6 @@ impl MacAddr {
     /// * `src` - slice from which to copy MAC address content.
     #[inline]
     pub fn from_bytes_unchecked(src: &[u8]) -> MacAddr {
-        // TODO: using something like std::mem::uninitialized could avoid the extra initialization,
-        // if this ever becomes a performance bottleneck.
         let mut bytes = [0u8; MAC_ADDR_LEN as usize];
         bytes[..].copy_from_slice(src);