Rename all_crate_nums query to crates and remove useless wrapper

compiler/rustc_passes/src/diagnostic_items.rs

@@ -121,7 +121,7 @@ fn all_diagnostic_items<'tcx>(tcx: TyCtxt<'tcx>, (): ()) -> FxHashMap<Symbol, De
     let mut collector = FxHashMap::default();
 
     // Collect diagnostic items in other crates.
-    for &cnum in tcx.crates().iter().chain(std::iter::once(&LOCAL_CRATE)) {
+    for &cnum in tcx.crates(()).iter().chain(std::iter::once(&LOCAL_CRATE)) {
         for (&name, &def_id) in tcx.diagnostic_items(cnum).iter() {
             collect_item(tcx, &mut collector, name, def_id);
         }