Remove IBC Fees support

[chipshort]

We added support in 2.2 for IBC Fees in the form of IbcMsg::PayPacketFee, IbcMsg::PayPacketFeeAsync and IbcQuery::FeeEnabledChannel. Since then, support in ibc-go has been removed and consequently support in wasmd had to be removed too.
So, only wasmd 0.54 supports this and I doubt any chain will upgrade their channels to enable IBC Fees, so we might as well remove the query / messages from cosmwasm-std in 3.0