Inline and remove submit_pre_codegened_module_to_llvm.

It has a single callsite, and provides little value.

compiler/rustc_codegen_ssa/src/base.rs

@@ -664,9 +664,16 @@ pub fn codegen_crate<B: ExtraBackendMethods>(
             )
         });
 
-        ongoing_codegen.submit_pre_codegened_module_to_llvm(
-            tcx,
+        ongoing_codegen.wait_for_signal_to_codegen_item();
+        ongoing_codegen.check_for_errors(tcx.sess);
+
+        // These modules are generally cheap and won't throw off scheduling.
+        let cost = 0;
+        submit_codegened_module_to_llvm(
+            &backend,
+            &ongoing_codegen.coordinator.sender,
             ModuleCodegen { name: llmod_id, module_llvm, kind: ModuleKind::Allocator },
+            cost,
         );
     }