migrate to steel

program/src/update.rs

@@ -1,8 +1,8 @@
 use ore_api::{loaders::*, state::Proof};
-use ore_utils::*;
 use solana_program::{
     account_info::AccountInfo, entrypoint::ProgramResult, program_error::ProgramError,
 };
+use steel::*;
 
 /// Update changes the miner authority on a proof account.
 pub fn process_update(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResult {