remove index hash calculation as an option (#23928)

(cherry picked from commit c24de17278)

# Conflicts:
#	validator/src/main.rs

local-cluster/src/validator_configs.rs

@@ -55,7 +55,6 @@ pub fn safe_clone_config(config: &ValidatorConfig) -> ValidatorConfig {
         warp_slot: config.warp_slot,
         accounts_db_test_hash_calculation: config.accounts_db_test_hash_calculation,
         accounts_db_skip_shrink: config.accounts_db_skip_shrink,
-        accounts_db_use_index_hash_calculation: config.accounts_db_use_index_hash_calculation,
         tpu_coalesce_ms: config.tpu_coalesce_ms,
         validator_exit: Arc::new(RwLock::new(Exit::default())),
         poh_hashes_per_batch: config.poh_hashes_per_batch,