sp-api: Move macro related re-exports to __private (#2446)

This moves the macro related re-exports to `__private` to make it more
obvious for downstream users that they are using an internal api.

---------

Co-authored-by: command-bot <>

substrate/client/api/src/call_executor.rs

@@ -21,12 +21,12 @@
 use sc_executor::{RuntimeVersion, RuntimeVersionOf};
 use sp_core::traits::CallContext;
 use sp_externalities::Extensions;
-use sp_runtime::traits::Block as BlockT;
+use sp_runtime::traits::{Block as BlockT, HashingFor};
 use sp_state_machine::{OverlayedChanges, StorageProof};
 use std::cell::RefCell;
 
 use crate::execution_extensions::ExecutionExtensions;
-use sp_api::{HashingFor, ProofRecorder};
+use sp_api::ProofRecorder;
 
 /// Executor Provider
 pub trait ExecutorProvider<Block: BlockT> {

substrate/client/api/src/in_mem.rs

@@ -812,9 +812,8 @@ pub fn check_genesis_storage(storage: &Storage) -> sp_blockchain::Result<()> {
 #[cfg(test)]
 mod tests {
 	use crate::{in_mem::Blockchain, NewBlockState};
-	use sp_api::HeaderT;
 	use sp_blockchain::Backend;
-	use sp_runtime::{ConsensusEngineId, Justifications};
+	use sp_runtime::{traits::Header as HeaderT, ConsensusEngineId, Justifications};
 	use substrate_test_runtime::{Block, Header, H256};
 
 	pub const ID1: ConsensusEngineId = *b"TST1";