Remove proposer based rewards

[tac0turtle]

Summary

Proposer based rewards were added when the cosmos hub was launched. As we have started to see in the ecosystem as chains are using epochs they are setting proposer based rewards to 0. Also there is a belief that the proposer based reward system has a bug in it that #9161.

Secondly with how tendermint does proposer selection this means that the top validators, who propose more often, get more rewards than the smaller validators.

Proposal

Remove Proposer based rewards outright and have a equal distribution of tokens across all validators.

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned