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

6 files changed, 0 insertions, 94 deletions

diff --git a/cli/bench/http/deno_http_flash_ops.js b/cli/bench/http/deno_http_flash_ops.js
deleted file mode 100644
index 7b024f9af..000000000
--- a/cli/bench/http/deno_http_flash_ops.js
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-
-// deno-lint-ignore-file
-
-const {
-  opAsync,
-  ops: { op_flash_make_request, op_flash_serve },
-  encode,
-} = Deno[Deno.internal].core;
-const addr = Deno.args[0] || "127.0.0.1:4500";
-const [hostname, port] = addr.split(":");
-const serverId = op_flash_serve({ hostname, port, reuseport: true });
-const serverPromise = opAsync("op_flash_drive_server", serverId);
-
-const fastOps = op_flash_make_request();
-function nextRequest() {
-  return fastOps.nextRequest();
-}
-function respond(token, response) {
-  return fastOps.respond(token, response, true);
-}
-
-const response = encode(
-  "HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello World",
-);
-let offset = 0;
-while (true) {
-  let token = nextRequest();
-  if (token === 0) token = await opAsync("op_flash_next_async", serverId);
-  for (let i = offset; i < offset + token; i++) {
-    respond(
-      i,
-      response,
-    );
-  }
-  offset += token;
-}
diff --git a/cli/bench/http/deno_http_flash_ops_spawn.js b/cli/bench/http/deno_http_flash_ops_spawn.js
deleted file mode 100644
index b9d11462f..000000000
--- a/cli/bench/http/deno_http_flash_ops_spawn.js
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-
-if (Deno.build.os !== "linux") {
-  throw new Error("SO_REUSEPORT is only supported on Linux");
-}
-
-const executable = Deno.execPath();
-const path = new URL("./deno_http_flash_ops.js", import.meta.url).pathname;
-// single flash instance runs on ~1.8 cores
-const cpus = navigator.hardwareConcurrency / 2;
-const processes = new Array(cpus);
-for (let i = 0; i < cpus; i++) {
-  const proc = Deno.run({
-    cmd: [executable, "run", "-A", "--unstable", path, Deno.args[0]],
-  });
-  processes.push(proc.status());
-}
-await Promise.all(processes);
diff --git a/cli/bench/http/deno_http_flash_post_bin.js b/cli/bench/http/deno_http_flash_post_bin.js
deleted file mode 100644
index b81553dcd..000000000
--- a/cli/bench/http/deno_http_flash_post_bin.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-
-const addr = Deno.args[0] || "127.0.0.1:4500";
-const [hostname, port] = addr.split(":");
-const { serve } = Deno;
-
-async function handler(request) {
-  try {
-    const buffer = await request.arrayBuffer();
-    return new Response(buffer.byteLength);
-  } catch (e) {
-    console.log(e);
-  }
-}
-
-serve(handler, { hostname, port });
diff --git a/cli/bench/http/deno_http_flash_post_bin.lua b/cli/bench/http/deno_http_flash_post_bin.lua
deleted file mode 100644
index c8f5d3e3f..000000000
--- a/cli/bench/http/deno_http_flash_post_bin.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-wrk.method = "POST"
-wrk.headers["Content-Type"] = "application/octet-stream"
-
-file = io.open("./cli/bench/testdata/128k.bin", "rb")
-wrk.body = file:read("*a")
\ No newline at end of file
diff --git a/cli/bench/http/deno_http_flash_spawn.js b/cli/bench/http/deno_http_flash_spawn.js
deleted file mode 100644
index e47acffc5..000000000
--- a/cli/bench/http/deno_http_flash_spawn.js
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-
-if (Deno.build.os !== "linux") {
-  throw new Error("SO_REUSEPORT is only supported on Linux");
-}
-
-const executable = Deno.execPath();
-const path = new URL("./deno_http_flash.js", import.meta.url).pathname;
-// single flash instance runs on ~1.8 cores
-const cpus = navigator.hardwareConcurrency / 2;
-const processes = new Array(cpus);
-for (let i = 0; i < cpus; i++) {
-  const proc = Deno.run({
-    cmd: [executable, "run", "-A", "--unstable", path, Deno.args[0]],
-  });
-  processes.push(proc.status());
-}
-await Promise.all(processes);
diff --git a/cli/bench/http/deno_http_flash.js b/cli/bench/http/deno_http_serve.js
index a0db62630..a0db62630 100644
--- a/cli/bench/http/deno_http_flash.js
+++ b/cli/bench/http/deno_http_serve.js