[nexus] Remove old CTE builder machinery

nexus/db-macros/src/lib.rs

@@ -21,7 +21,6 @@ use syn::spanned::Spanned;
 use syn::{parse_quote, Data, DataStruct, DeriveInput, Error, Fields, Ident};
 
 mod lookup;
-mod subquery;
 #[cfg(test)]
 mod test_helpers;
 
@@ -134,35 +133,6 @@ fn get_field_with_name<'a>(
     }
 }
 
-/// Implements the [`Subquery`] trait.
-///
-/// Additionally, implements
-/// [`diesel::query_builder::QueryFragment`](https://docs.diesel.rs/master/diesel/query_builder/trait.QueryFragment.html),
-/// which refers to the subquery by the name supplied as input.
-///
-/// Callers should also derive
-/// [`diesel::query_builder::QueryId`](https://docs.diesel.rs/master/diesel/query_builder/trait.QueryId.html),
-/// as it should be implemented for structures which implement
-/// [`diesel::query_builder::QueryFragment`](https://docs.diesel.rs/master/diesel/query_builder/trait.QueryFragment.html).
-///
-/// Example usage:
-///
-/// ```ignore
-/// #[derive(Subquery, QueryId)]
-/// #[subquery(name = my_table)]
-/// struct MyQuery {
-///   query: Box<dyn CteQuery<SqlType = my_table::SqlType>>
-/// }
-/// ```
-#[proc_macro_derive(Subquery, attributes(subquery))]
-pub fn subquery_target(
-    input: proc_macro::TokenStream,
-) -> proc_macro::TokenStream {
-    subquery::derive_impl(input.into())
-        .unwrap_or_else(|e| e.to_compile_error())
-        .into()
-}
-
 // Describes which derive macro is being used; allows sharing common code.
 #[derive(Clone, Copy, Debug)]
 enum IdentityVariant {

nexus/db-queries/src/db/mod.rs

@@ -29,7 +29,6 @@ pub mod queries;
 mod raw_query_builder;
 mod saga_recovery;
 mod sec_store;
-pub mod subquery;
 pub(crate) mod true_or_cast_error;
 mod update_and_check;