Review and check treasury pallet, can be simplified or removed?

[hackfisher]

Review the treasury pallet to determine if it can be simplified or removed, especially if functions like treasury proposals are no longer used or needed. This can help simplify the audit works of gov risk control/review.

darwinia/runtime/crab/src/pallets/governance.rs

Line 107 in 0b6fba7

impl pallet_treasury::Config for Runtime {

[aurexav]

It may require a little more effort to simplify the functionality of the pallet.

Removing it would be preferable if using Tally for managing the Treasury account is feasible.