zcash_client_sqlite: `serialization` module should not have been public.

zcash_client_sqlite/CHANGELOG.md

@@ -11,8 +11,6 @@ and this library adheres to Rust's notion of
 ### Added
 - `zcash_client_sqlite::commitment_tree` Types related to management of note
   commitment trees using the `shardtree` crate.
-- `zcash_client_sqlite::serialization` Serialization formats for data stored
-  as SQLite BLOBs in the wallet database.
 - A new default-enabled feature flag `multicore`. This allows users to disable
   multicore support by setting `default_features = false` on their
   `zcash_primitives`, `zcash_proofs`, and `zcash_client_sqlite` dependencies.

zcash_client_sqlite/src/lib.rs

@@ -85,7 +85,7 @@ use {
 
 pub mod chain;
 pub mod error;
-pub mod serialization;
+pub(crate) mod serialization;
 
 pub mod wallet;
 use wallet::{