refactor: remove "ext/flash" (#18578)

With https://github.com/denoland/deno/pull/18568 landed we no longer
need "ext/flash". 

This commit removes "deno_flash" extension completely.

This should have some impact on the binary and snapshot size.

Closes https://github.com/denoland/deno/issues/17356

1 files changed, 0 insertions, 23 deletions

diff --git a/cli/tests/testdata/run/flash_shutdown/main.ts b/cli/tests/testdata/run/flash_shutdown/main.ts
deleted file mode 100644
index 5e0908efb..000000000
--- a/cli/tests/testdata/run/flash_shutdown/main.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-
-// Deno.serve caused segfault with this example after #16383
-// refs:
-// - https://github.com/denoland/deno/pull/16383
-// - https://github.com/denoland/deno_std/issues/2882
-// - revert https://github.com/denoland/deno/pull/16610
-
-const ctl = new AbortController();
-Deno.serve(() =>
-  new Promise((resolve) => {
-    resolve(new Response(new TextEncoder().encode("ok")));
-    ctl.abort();
-  }), {
-  signal: ctl.signal,
-  async onListen({ port }) {
-    const a = await fetch(`http://localhost:${port}`, {
-      method: "POST",
-      body: "",
-    });
-    await a.text();
-  },
-});