Remove rlp support for sealed types

[mattsse]

Describe the feature

ref #11123

we have rlp support for sealed types

reth/crates/primitives-traits/src/header/sealed.rs

Lines 75 to 98 in b537672

	impl Encodable for SealedHeader {
	fn encode(&self, out: &mut dyn BufMut) {
	self.header.encode(out);
	}
	}
	impl Decodable for SealedHeader {
	fn decode(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
	let b = &mut &**buf;
	let started_len = buf.len();
	// decode the header from temp buffer
	let header = Header::decode(b)?;
	// hash the consumed bytes, the rlp encoded header
	let consumed = started_len - b.len();
	let hash = keccak256(&buf[..consumed]);
	// update original buffer
	*buf = *b;
	Ok(Self { header, hash })
	}
	}

this should never be used because the hash is recovered and never encoded in any payload

TODO

• remove rlp support from sealed types, seems pointless, especially if there's a deref and the type should be created via decode + seal

Additional context

cc @greged93 @emhane

ref alloy-rs/core#754

No response

[edisontim]

Hello, can I take this one ?

[mattsse]

assigned

[mattsse]

oh actually I changed my mind about this after looking at the rlpdecode impl

because this is actually nice to have