refactor (vscode): migrate from submodule to subtree

.tours/start-development.tour

@@ -5,7 +5,7 @@
     {
       "file": "package.json",
       "line": 31,
-      "description": "## Commands\n\nTo start developing, make sure you have Node 12+ and the [required dependencies](https://github.com/Microsoft/vscode/wiki/How-to-Contribute#prerequisites) installed. Then, run the following commands:\n\n1. Install dependencies:\n>> yarn\n\n2. Clone and patch VS Code and install its dependencies:\n>> yarn vscode\n\n3. Start development mode (and watch for changes):\n>> yarn watch"
+      "description": "## Commands\n\nTo start developing, make sure you have Node 12+ and the [required dependencies](https://github.com/Microsoft/vscode/wiki/How-to-Contribute#prerequisites) installed. Then, run the following commands:\n\n1. Install dependencies:\n>> yarn\n\n3. Start development mode (and watch for changes):\n>> yarn watch"
     },
     {
       "file": "src/node/app.ts",

ci/README.md

@@ -55,15 +55,6 @@ This directory contains scripts used for the development of code-server.
   - Runs tests.
 - [./ci/dev/ci.sh](./dev/ci.sh) (`yarn ci`)
   - Runs `yarn fmt`, `yarn lint` and `yarn test`.
-- [./ci/dev/vscode.sh](./dev/vscode.sh) (`yarn vscode`)
-  - Ensures [./lib/vscode](../lib/vscode) is cloned, patched and dependencies are installed.
-- [./ci/dev/patch-vscode.sh](./dev/patch-vscode.sh) (`yarn vscode:patch`)
-  - Applies [./ci/dev/vscode.patch](./dev/vscode.patch) to [./lib/vscode](../lib/vscode).
-- [./ci/dev/diff-vscode.sh](./dev/diff-vscode.sh) (`yarn vscode:diff`)
-  - Diffs [./lib/vscode](../lib/vscode) into [./ci/dev/vscode.patch](./dev/vscode.patch).
-- [./ci/dev/vscode.patch](./dev/vscode.patch)
-  - Our patch of VS Code, see [./doc/CONTRIBUTING.md](../doc/CONTRIBUTING.md#vs-code-patch).
-  - Generate it with `yarn vscode:diff` and apply with `yarn vscode:patch`.
 - [./ci/dev/watch.ts](./dev/watch.ts) (`yarn watch`)
   - Starts a process to build and launch code-server and restart on any code changes.
   - Example usage in [./doc/CONTRIBUTING.md](../doc/CONTRIBUTING.md).