chore: don't re-export unstable TransactionManager trait

Author: abonander

sqlx-core/src/transaction.rs

@@ -11,7 +11,6 @@ use crate::pool::MaybePoolConnection;
 /// Generic management of database transactions.
 ///
 /// This trait should not be used, except when implementing [`Connection`].
-#[doc(hidden)]
 pub trait TransactionManager {
     type Database: Database;
 

src/lib.rs

@@ -30,7 +30,7 @@ pub use sqlx_core::query_scalar::{query_scalar, query_scalar_with};
 pub use sqlx_core::raw_sql::{raw_sql, RawSql};
 pub use sqlx_core::row::Row;
 pub use sqlx_core::statement::Statement;
-pub use sqlx_core::transaction::{Transaction, TransactionManager};
+pub use sqlx_core::transaction::Transaction;
 pub use sqlx_core::type_info::TypeInfo;
 pub use sqlx_core::types::Type;
 pub use sqlx_core::value::{Value, ValueRef};