Revert "Add linkup command to improve link functionality" (#4439)

This reverts commit 2504f6fce4.

src/node/link.ts

@@ -1,16 +0,0 @@
-import { logger } from "@coder/logger"
-import { ChildProcessWithoutNullStreams, spawn } from "child_process"
-import path from "path"
-
-export function startLink(address: URL | string): ChildProcessWithoutNullStreams {
-  if (typeof address === "string") {
-    throw new Error("Cannot link socket paths")
-  }
-
-  const port = parseInt(address.port, 10)
-  logger.debug(`running link targeting ${port}`)
-
-  return spawn(path.resolve(__dirname, "../../lib/linkup"), ["--devurl", `code:${port}:code-server`], {
-    shell: false,
-  })
-}

src/node/main.ts

@@ -1,14 +1,12 @@
 import { field, logger } from "@coder/logger"
-import { ChildProcessWithoutNullStreams } from "child_process"
 import http from "http"
 import path from "path"
 import { Disposable } from "../common/emitter"
-import { plural, logError } from "../common/util"
+import { plural } from "../common/util"
 import { createApp, ensureAddress } from "./app"
 import { AuthType, DefaultedArgs, Feature } from "./cli"
 import { coderCloudBind } from "./coder_cloud"
 import { commit, version, vsRootPath } from "./constants"
-import { startLink } from "./link"
 import { register } from "./routes"
 import { humanPath, isFile, loadAMDModule, open } from "./util"
 
@@ -156,19 +154,6 @@ export const runCodeServer = async (
     logger.info("  - Connected to cloud agent")
   }
 
-  let linkAgent: undefined | ChildProcessWithoutNullStreams
-  try {
-    linkAgent = startLink(serverAddress)
-    linkAgent.on("error", (error) => {
-      logError(logger, "link daemon", error)
-    })
-    linkAgent.on("close", (code) => {
-      logger.debug("link daemon closed", field("code", code))
-    })
-  } catch (error) {
-    logError(logger, "link daemon", error)
-  }
-
   if (args.enable && args.enable.length > 0) {
     logger.info("Enabling the following experimental features:")
     args.enable.forEach((feature) => {
@@ -196,7 +181,6 @@ export const runCodeServer = async (
   return {
     server: app.server,
     dispose: async () => {
-      linkAgent?.kill()
       disposeRoutes()
       await app.dispose()
     },