Community fund accumulates a small balance

[haasted]

Describe the bug
Community pool is not completely removed. Any remainder that may exist when paying out rewards is sent to the community pool, which will thus slowly accumulate a small balance over time.

How to reproduce
The current balance of the community pool can be inspected using the light client interface, e.g. https://lilmermaid.validator.network/light/distribution/community_pool

The addition of funds to its balance takes place in several places, notably withdrawDelegationRewards method in delegation.go in the distribution module.

Expected behavior
Community fund should ideally be completely disabled. A possible solution would be to periodically add its balance to the distribution account, once the balance is large enough to be able to do it.