Use literal-based templates for more stuff.

packages/babel-plugin-transform-es2015-classes/src/vanilla.js

@@ -6,12 +6,6 @@ import * as defineMap from "@babel/helper-define-map";
 import template from "@babel/template";
 import * as t from "@babel/types";
 
-const buildDerivedConstructor = template(`
-  (function () {
-    super(...arguments);
-  })
-`);
-
 const noMethodVisitor = {
   "FunctionExpression|FunctionDeclaration"(path) {
     path.skip();
@@ -212,7 +206,11 @@ export default class ClassTransformer {
     let params, body;
 
     if (this.isDerived) {
-      const constructor = buildDerivedConstructor().expression;
+      const constructor = template.expression.ast`
+        (function () {
+          super(...arguments);
+        })
+      `;
       params = constructor.params;
       body = constructor.body;
     } else {