remove heroku code for old updater

script/release.js

@@ -10,12 +10,10 @@ const token = process.env.ELECTRON_API_DEMO_GITHUB_TOKEN
 const version = require('../package').version
 
 checkToken()
-  .then(checkHerokuLoginStatus)
   .then(zipAssets)
   .then(createRelease)
   .then(uploadAssets)
   .then(publishRelease)
-  .then(deployToHeroku)
   .catch((error) => {
     console.error(error.message || error)
     process.exit(1)
@@ -29,20 +27,6 @@ function checkToken () {
   }
 }
 
-function checkHerokuLoginStatus () {
-  return new Promise((resolve, reject) => {
-    console.log('Checking Heroku login status')
-
-    childProcess.exec('heroku whoami', (error, stdout, stderr) => {
-      if (error) {
-        reject('You are not logged in to GitHub\'s Heroku Enterprise account. To log in, run this command:\n$ heroku login --sso')
-      } else {
-        resolve()
-      }
-    })
-  })
-}
-
 function zipAsset (asset) {
   return new Promise((resolve, reject) => {
     const assetBase = path.basename(asset.path)
@@ -188,25 +172,3 @@ function publishRelease (release) {
     })
   })
 }
-
-function deployToHeroku () {
-  return new Promise((resolve, reject) => {
-    console.log('Deploying to heroku')
-
-    const herokuCommand = [
-      'heroku',
-      'config:set',
-      '-a',
-      'github-electron-api-demos',
-      `ELECTRON_LATEST_RELEASE=${version}`
-    ].join(' ')
-
-    childProcess.exec(herokuCommand, (error) => {
-      if (error) {
-        reject(error)
-      } else {
-        resolve()
-      }
-    })
-  })
-}