fix(pgwire): drop the unused mapper re-export

types/mod.rs re-exported numeric_code_to_sqlstate, but the routed gateway
calls it by its full path and internal_message uses the module directly, so
the re-export was dead and Lint & Check failed on the unused import.

Author: EnRaiha

nodedb/src/control/server/pgwire/types/mod.rs

@@ -11,7 +11,6 @@ pub mod internal_message;
 pub mod parse;
 pub mod privilege;
 
-pub(crate) use error_map::numeric_code_to_sqlstate;
 pub use error_map::{
     error_to_sqlstate, notice_warning, response_status_to_sqlstate, shape_error_to_pg,
     sqlstate_error,