doc/graphql: switch default example from templates to extension

doc/website/src/theme/prism-gotemplate.js

@@ -1,29 +0,0 @@
-
-/**
- * Copyright 2019-present Facebook Inc. All rights reserved.
- *
- * This source code is licensed under the Apache 2.0 license found
- * in the LICENSE file in the root directory of this source tree.
- *
- * @format
- */
-
-
-import ExecutionEnvironment from '@docusaurus/ExecutionEnvironment';
-import siteConfig from '@generated/docusaurus.config';
-
-const prismIncludeLanguages = (PrismObject) => {
-  if (ExecutionEnvironment.canUseDOM) {
-    const {
-      themeConfig: {prism: {additionalLanguages = []} = {}},
-    } = siteConfig;
-    window.Prism = PrismObject;
-    additionalLanguages.forEach((lang) => {
-      require(`prismjs/components/prism-${lang}`); // eslint-disable-line
-    });
-    delete window.Prism;
-  }
-};
-
-
-export default prismIncludeLanguages;