Remove unused serde traits

[Fraser999]

We should remove the serde traits on the following types as the functionality is no longer required:

• TransactionId in astria-core
• Address in astria-core
• Deposit in astria-core
• Proof in astria-merkle

This is effectively reverting commit 3c47298.

Note that removing the impl for Deposit requires replacing it with a Display impl, or potentially a Valuable impl.

The Display impl could be implemented as follows:

impl Display for Deposit {
    fn fmt(&self, formatter: &mut Formatter<'_>) -> std::fmt::Result {
        write!(
            formatter,
            "Deposit[bridge address: {}, rollup id: {}, amount: {}, asset: {}, destination chain \
             address: {}]",
            self.bridge_address,
            self.rollup_id,
            self.amount,
            self.asset,
            self.destination_chain_address,
        )
    }
}

┆Issue Number: ENG-893