fix(postgres): dead code StatementId::UNNAMED

Author: abonander

sqlx-postgres/src/io/mod.rs

@@ -10,14 +10,14 @@ pub(crate) use sqlx_core::io::*;
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub(crate) struct StatementId(IdInner);
 
-#[allow(dead_code)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub(crate) struct PortalId(IdInner);
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 struct IdInner(Option<NonZeroU32>);
 
 impl StatementId {
+    #[allow(dead_code)]
     pub const UNNAMED: Self = Self(IdInner::UNNAMED);
 
     pub const NAMED_START: Self = Self(IdInner::NAMED_START);