This proposal is to cancel the proposal #5 to upgrade Moonriver to RT2301.
Engineers have found a bug in RT2301 and provided a RT2302 with a fix

Cancel an ongoing referendum.

- `origin`: must be the `CancelOrigin`.
- `index`: The index of the referendum to be cancelled.

Emits `Cancelled`.

- **Problem Statement:** Ongoing costs for supporting Moonbeam, Moonriver, and Moonbase alpha networks in BlastAPI, requested quarterly.
- **Significance:** Ensuring easy, fast, and reliable access to high-performance APIs for Moonbeam, Moonriver, and Moonbase alpha networks, allowing developers to focus on app development.
- **Proposed Solution:** Utilizing $24,000 quarterly to cover infrastructure and maintenance costs for the networks on BlastAPI.
- **Expected Outcomes:** Enhanced infrastructure support, reduced outage risks, and lowered infrastructure costs for Moonbeam, Moonriver, and Moonbase alpha networks.

#6 Cancel Proposal #5 Runtime 2301 Upgrade