polkadot-parachain-bin: Remove contracts parachain (#5471)
Related to: https://github.com/paritytech/polkadot-sdk/issues/5210 Follow-up for https://github.com/paritytech/polkadot-sdk/pull/5288, as per this comment: https://github.com/paritytech/polkadot-sdk/pull/5288#discussion_r1711157476 I hope I understood this correctly.