Remove leftovers of leftovers of contracts-rococo (#7750)
Follow-up of https://github.com/paritytech/polkadot-sdk/pull/7638, which attempted to remove contracts-rococo. But there were some leftover weight files still chilling in the repo.
Follow-up of https://github.com/paritytech/polkadot-sdk/pull/7638, which attempted to remove contracts-rococo. But there were some leftover weight files still chilling in the repo.