Remove legacy errorBanner js

Remove file and remove from build bundle

Author: kr8n3r

app/assets/javascripts/errorBanner.js

@@ -102,9 +102,6 @@ export default [
       paths.src + 'javascripts/cookieCleanup.js',
       paths.src + 'javascripts/updateContent.js',
       paths.src + 'javascripts/templateFolderForm.js',
-      paths.src + 'javascripts/updateStatus.js',
-      paths.src + 'javascripts/authenticateSecurityKey.js',
-      paths.src + 'javascripts/errorBanner.js',
       paths.src + 'javascripts/main.js',
     ],
     output: {