Reduce size of TypeScript Compiler snapshot (#6809)

This PR is intentionally ugly. It duplicates all of the code in cli/js2/ into
cli/tsc/  ... because it's very important that we all understand that this code
is unnecessarily duplicated in our binary. I hope this ugliness provides the
motivation to clean it up.

The typescript git submodule is removed, because it's a very large repo and
contains all sorts of stuff we don't need. Instead the necessary files are
copied directly into the deno repo. Hence +200k lines.

COMPILER_SNAPSHOT.bin size
```
master         3448139
this branch    3320972
```

Fixes #6812

1 files changed, 0 insertions, 25 deletions

diff --git a/cli/js2/lib.deno.window.d.ts b/cli/js2/lib.deno.window.d.ts
deleted file mode 100644
index 61c5abf8a..000000000
--- a/cli/js2/lib.deno.window.d.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-
-/* eslint-disable @typescript-eslint/no-explicit-any */
-
-/// <reference no-default-lib="true" />
-/// <reference lib="deno.ns" />
-/// <reference lib="deno.shared_globals" />
-/// <reference lib="esnext" />
-
-declare interface Window extends EventTarget {
-  readonly window: Window & typeof globalThis;
-  readonly self: Window & typeof globalThis;
-  onload: ((this: Window, ev: Event) => any) | null;
-  onunload: ((this: Window, ev: Event) => any) | null;
-  close: () => void;
-  readonly closed: boolean;
-  Deno: typeof Deno;
-}
-
-declare const window: Window & typeof globalThis;
-declare const self: Window & typeof globalThis;
-declare const onload: ((this: Window, ev: Event) => any) | null;
-declare const onunload: ((this: Window, ev: Event) => any) | null;
-
-/* eslint-enable @typescript-eslint/no-explicit-any */