remove BankTestConfig.caching_enabled (#29173)

rpc/src/rpc.rs

@@ -4795,7 +4795,6 @@ pub mod tests {
             let (bank_forks, mint_keypair, leader_vote_keypair) =
                 new_bank_forks_with_config(BankTestConfig {
                     secondary_indexes: config.account_indexes.clone(),
-                    accounts_db_caching_enabled: true,
                 });
 
             let ledger_path = get_tmp_ledger_path!();

runtime/src/bank.rs

@@ -1151,7 +1151,6 @@ pub struct NewBankOptions {
 #[derive(Debug, Default)]
 pub struct BankTestConfig {
     pub secondary_indexes: AccountSecondaryIndexes,
-    pub accounts_db_caching_enabled: bool,
 }
 
 #[derive(Debug)]