Gate wtfnode behind WTF_NODE env var

After thinking about it some more it's probably mostly only useful to
see the output when the tests are hanging. Otherwise there's a lot of
noise about Jest child processes and pipes.

src/common/util.ts

@@ -1,5 +1,4 @@
 import { logger, field } from "@coder/logger"
-import { Cookie } from "../../test/helpers"
 
 export interface Options {
   base: string
@@ -121,24 +120,3 @@ export function logError(prefix: string, err: any): void {
     logger.error(`${prefix}: ${err}`)
   }
 }
-
-/**
- * Checks if a cookie exists in array of cookies
- */
-export function checkForCookie(cookies: Array<Cookie>, key: string): boolean {
-  // Check for a cookie where the name is equal to key
-  return Boolean(cookies.find((cookie) => cookie.name === key))
-}
-
-/**
- * Creates a login cookie if one doesn't already exist
- */
-export function createCookieIfDoesntExist(cookies: Array<Cookie>, cookieToStore: Cookie): Array<Cookie> {
-  const cookieName = cookieToStore.name
-  const doesCookieExist = checkForCookie(cookies, cookieName)
-  if (!doesCookieExist) {
-    const updatedCookies = [...cookies, cookieToStore]
-    return updatedCookies
-  }
-  return cookies
-}