Cleanup ledger macros (#6916)

automerge

local-cluster/src/lib.rs

@@ -2,8 +2,5 @@ pub mod cluster;
 pub mod cluster_tests;
 pub mod local_cluster;
 
-#[macro_use]
-extern crate solana_ledger;
-
 #[macro_use]
 extern crate solana_storage_program;

local-cluster/src/local_cluster.rs

@@ -10,7 +10,7 @@ use solana_core::{
     service::Service,
     validator::{Validator, ValidatorConfig},
 };
-use solana_ledger::blocktree::create_new_tmp_ledger;
+use solana_ledger::create_new_tmp_ledger;
 use solana_sdk::{
     client::SyncClient,
     clock::{DEFAULT_SLOTS_PER_EPOCH, DEFAULT_SLOTS_PER_SEGMENT, DEFAULT_TICKS_PER_SLOT},