Migrate trait & type to new ids

crates/ra_hir/src/code_model_impl.rs

@@ -1,18 +1,3 @@
 mod krate; // `crate` is invalid ident :(
 mod module;
 pub(crate) mod function;
-
-use ra_syntax::{AstNode, TreeArc};
-
-use crate::{HirDatabase, DefId, HirFileId};
-
-pub(crate) fn def_id_to_ast<N: AstNode>(
-    db: &impl HirDatabase,
-    def_id: DefId,
-) -> (HirFileId, TreeArc<N>) {
-    let (file_id, syntax) = def_id.source(db);
-    let ast = N::cast(&syntax)
-        .unwrap_or_else(|| panic!("def points to wrong source {:?} {:?}", def_id, syntax))
-        .to_owned();
-    (file_id, ast)
-}