* remove callbacks

* clippy

* fmt

* remove message fee

* it is compiling!

* fixes + fmt

* more cleanup

* more cleanup

* restore MessageDeliveryAndDispatchPayment since we'll need relayer rewards

* started rational relayer removal

* more removal

* removed estimate fee subcommand

* remove DispatchFeePayment

* more removals

* removed conversion rates && some metrics

* - unneeded associated type

* - OutboundMessageFee

* fix benchmarks compilation

* fmt

* test + fix benchmarks

* fix send message

* clippy

* update Substrate + Polkadot + Cumulus refs

* Origin -> RuntimeOrigin

* weights v1.5

* update refs once again + `cargo test -p pallet-bridge-grandpa` works

* started work on `cargo test -p pallet-bridge-messages`

* cargo test -p pallet-bridge-relayers

* cargo test -p pallet-bridge-parachains

* cargo test -p millau-runtime

* cargo test -p bridge-runtime-common

* cargo test -p rialto-runtime

* cargo test -p rialto-parachain-runtime

* cargo test -p millau-bridge-node

* cargo test -p rialto-bridge-node

* cargo test -p rialto-parachain-collator

* cargo test -p messages-relay

* cargo test -p parachains-relay

* cargo test -p substrate-relay

* cargo test --all

* cargo check -p millau-runtime --locked --features runtime-benchmarks

* fix remaining test

* fmt

* try to allow clippy failure temporarily

* Revert "try to allow clippy failure temporarily"

This reverts commit d1b65935.

* use min_by

* Revert "use min_by"

This reverts commit 33042f49.

* Revert "Revert "use min_by""

This reverts commit 1d2204f0.

* trigger CI

* Revert "trigger CI"

This reverts commit 259d91b5.

* new day, new clippy warning

* more clippy issues

* introduce relayers pallet

* add MessageDeliveryAndDispatchPaymentAdapter

* plug in pallet into test runtimes

* tests prototype

* tests for the relayers pallet

* tests for payment adapter

* mint_reward_payment_procedure_actually_mints_tokens

* benchmarks

* remove irrelevant todo

* remove redundant clone