Back out "Merge internal and external troubleshooting pages into one with optional internal-only content"

Summary: Unfortunately optional require does not work with docusaurus bundler configuration in case file not exist, so open source build is failing now. I'm backing out this commit until solution for dynamic imports in docusaurus found.

Reviewed By: mweststrate

Differential Revision: D23679147

fbshipit-source-id: 7934e0a7decf128c1914f52645adaf4617c97eea

docs/getting-started/index.mdx

@@ -2,6 +2,7 @@
 id: index
 title: Desktop App
 ---
+import useBaseUrl from '@docusaurus/useBaseUrl';
 import FBContent from '../../website/src/components/FBContent';
 
 Flipper helps you debug Android and iOS apps running in an emulator/simulator or connected physical development devices. Flipper consists of two parts:

docs/troubleshooting.mdx

@@ -5,7 +5,6 @@ sidebar_label: Troubleshooting Issues
 ---
 import useBaseUrl from '@docusaurus/useBaseUrl';
 import Link from '@docusaurus/Link';
-import FBContent from '../website/src/components/FBContent';
 
 We hope that flipper works well out of the box, but the software is a work in progress and problems will occur. Below are some known issues and steps you can take to try to resolve them.
 
@@ -166,9 +165,3 @@ If you experience errors such as `Undefined symbol: associated type descriptor f
    <img alt="Screenshot showing the places mentioned in the last steps" src={useBaseUrl("img/troubleshooting-react-native-ios-swift-2.png")} />
 
 1. Now you can run your build normally.
-
-## Facebook-specific issues
-
-<FBContent 
-  internal={() => require('./fb/troubleshooting.mdx')} 
-  external={"Luckily you're in Open Source, so you don't have to worry about this stuff."} />

website/sidebars.js

@@ -98,6 +98,7 @@ module.exports = {
   },
   'fb-internal': {
     'FB Internal': fbInternalOnly([
+      'fb/troubleshooting',
       'fb/Add-flipper-to-android-app',
       'fb/Adding-flipper-to-ios-app',
       'fb/LauncherConfig',

website/src/components/FBContent.jsx

@@ -17,9 +17,6 @@ function createElement(createElement) {
   if (React.isValidElement(createElement)) {
     return createElement;
   }
-  if (typeof createElement === 'string') {
-    return createElement;
-  }
   const element = createElement();
   if (React.isValidElement(element)) {
     return element;