chore(third_party): Remove Tailscale derivation

This is now part of nixpkgs itself.

third_party/tailscale/0001-fix-client-logger.patch

@@ -1,28 +0,0 @@
-From ce33360524307b6da4f996a9f465260e121011f8 Mon Sep 17 00:00:00 2001
-From: Vincent Ambo <tazjin@google.com>
-Date: Tue, 11 Feb 2020 00:40:37 +0000
-Subject: [PATCH] fix(control): Ensure control client has a logger function
-
-For some reason this field ended up being nil in taillogin, which made
-it difficult to actually log in.
----
- control/controlclient/auto.go | 3 +++
- 1 file changed, 3 insertions(+)
-
-diff --git a/control/controlclient/auto.go b/control/controlclient/auto.go
-index 67f187f..09cdf6f 100644
---- a/control/controlclient/auto.go
-+++ b/control/controlclient/auto.go
-@@ -160,6 +160,9 @@ func NewNoStart(opts Options) (*Client, error) {
- //
- // It should only be called for clients created by NewNoStart.
- func (c *Client) Start() {
-+	c.logf = func(f string, args ...interface{}) {
-+		fmt.Printf(f, args)
-+	}
- 	go c.authRoutine()
- 	go c.mapRoutine()
- }
--- 
-2.23.0
-

third_party/tailscale/default.nix

@@ -1,41 +0,0 @@
-# This file packages the Tailscale client using the standard upstream
-# Go packaging mechanisms instead of buildGo.nix
-
-{ pkgs, lib, ... }:
-
-let
-  inherit (pkgs) buildGoModule fetchFromGitHub;
-in buildGoModule rec {
-  pname = "tailscale";
-  version = "fef25489";
-
-  src = fetchFromGitHub {
-    owner = "tailscale";
-    repo = "tailscale";
-    rev = "fef254898178d100f25b98530499adcf07cfded3";
-    sha256 = "1islxzr8lhnl2f0r686mcciwb8lzvqjczg9fs0nagr5pp6dsi9fa";
-  };
-
-  patches = [ ./0001-fix-client-logger.patch ];
-
-  goPackagePath = "tailscale.com";
-  modSha256 = "0cnih9flwgqjq4x4cwyac9yyz1prv2i2by1ki3g71ai8q621bq10";
-  subPackages = [
-    "cmd/relaynode"
-    "cmd/taillogin"
-    "cmd/tailscale"
-    "cmd/tailscaled"
-  ];
-
-  postInstall = ''
-    mkdir -p $out/etc/
-    cp ${src}/cmd/relaynode/acl.json $out/etc/
-  '';
-
-  meta = with lib; {
-    homepage = "https://tailscale.com/";
-    description = "Private WireGuard networks made easy";
-    license = licenses.bsd3;
-    maintainers = with maintainers; [ tazjin ];
-  };
-}