Remove old feature: simple_capitalization (#15763)

* Remove old feature: simple_capitalization

* Fix another failing test in core

* Finish up test cleanup

* Further clean up a bit

core/src/non_circulating_supply.rs

@@ -195,9 +195,11 @@ mod tests {
             ..GenesisConfig::default()
         };
         let mut bank = Arc::new(Bank::new(&genesis_config));
+        let sysvar_and_native_program_delta = 10;
         assert_eq!(
             bank.capitalization(),
             (num_genesis_accounts + num_non_circulating_accounts + num_stake_accounts) * balance
+                + sysvar_and_native_program_delta,
         );
 
         let non_circulating_supply = calculate_non_circulating_supply(&bank);