As a result of the removal of the `SudoBalances` proxy type from the runtime, a proxy was rendered undecodable before it was able to be migrated. This proposal cleans up the related storage entry, with more information about this issue avaliable <a href="https://github.com/polkadot-fellows/runtimes/issues/145" target="_blank" rel="noopener">here</a>.
A seperate referendum is already up for voting by the Fellowship to <a href="https://collectives.subsquare.io/fellowship/referenda/68" target="_blank" rel="noopener">whitelist this proposal's hash</a>.

As a result of the removal of the `SudoBalances` proxy type from the runtime, a proxy was rendered undecodable before it was able to be migrated. This proposal cleans up the related storage entry, with more information about this issue and considerations made avaliable <a href="https://github.com/polkadot-fellows/runtimes/issues/145" target="_blank" rel="noopener">here</a>.
A seperate referendum is already up for voting by the Fellowship to <a href="https://collectives.subsquare.io/fellowship/referenda/68" target="_blank" rel="noopener">whitelist this proposal's hash</a>.

Clean up undecodable storage entry

Cleans up an undecodable storage entry in the Proxy pallet.
See &nbsp;<a href="https://github.com/polkadot-fellows/runtimes/issues/145">https://github.com/polkadot-fellows/runtimes/issues/145</a> for details.

Cleans up undecodable storage entry in the Proxy pallet.
See &nbsp;<a href="https://github.com/polkadot-fellows/runtimes/issues/145">https://github.com/polkadot-fellows/runtimes/issues/145</a> for details.

Cleans up undecodable storage entry.
See &nbsp;<a href="https://github.com/polkadot-fellows/runtimes/issues/145">https://github.com/polkadot-fellows/runtimes/issues/145</a> for details.

Kill undecodable `Proxy::Proxies` key

See [`Pallet::dispatch_whitelisted_call_with_preimage`].

Problem Statement:
- Removal of the `SudoBalances` proxy type from the runtime caused an undecodable proxy to be rendered before migration.

Significance:
- The undecodable proxy needs to be cleaned up to resolve the issue caused by the removal of the `SudoBalances` proxy type.

Proposed Solution:
- Clean up the storage entry related to the undecodable proxy.

Expected Outcomes:
- Resolving the issue caused by the undecodable proxy.

#440 Clean up undecodable storage entry