After the migration to Polkadot succeeded, the migration runtime has to be superseded by a production runtime again, that removes the adjustments necessary for the migration and unlocks the business logic again. More information at https://github.com/zeitgeistpm/zeitgeist/releases/tag/v0.3.8-polkadot

 Reject a proposed spend. The original deposit will be slashed.

 May only be called from `T::RejectOrigin`.

 # <weight>
 - Complexity: O(1)
 - DbReads: `Proposals`, `rejected proposer account`
 - DbWrites: `Proposals`, `rejected proposer account`
 # </weight>

Problem Statement:
- Invalid calldata in Motion #17 caused corruption of storage and decoding issues in the apps frontend.

Significance:
- The corruption of storage and decoding issues hindered the ability to close and execute Motion #17.

Proposed Solution:
- Insert the correct calldata to remove a member from the advisory committee.

Expected Outcomes:
- Resolution of the corruption and decoding issues related to Motion #17.

#21 Deploy post-migration production runtime