move u2f library to webpack

app/views/devise/sessions/two_factor.html.haml

 - if inject_u2f_api?
   - content_for :page_specific_javascripts do
-    = page_specific_javascript_tag('u2f.js')
+    = page_specific_javascript_bundle_tag('u2f')
 
 %div
   = render 'devise/shared/tab_single', tab_title: 'Two-Factor Authentication'

app/views/profiles/two_factor_auths/show.html.haml

@@ -4,7 +4,7 @@
 
 - if inject_u2f_api?
   - content_for :page_specific_javascripts do
-    = page_specific_javascript_tag('u2f.js')
+    = page_specific_javascript_bundle_tag('u2f')
 
 .row.prepend-top-default
   .col-lg-3
@@ -96,4 +96,3 @@
   :javascript
     var button = "<a class='btn btn-xs btn-warning pull-right' data-method='patch' href='#{skip_profile_two_factor_auth_path}'>Configure it later</a>";
     $(".flash-alert").append(button);
-

config/application.rb

@@ -100,7 +100,6 @@ module Gitlab
     config.assets.precompile << "katex.js"
     config.assets.precompile << "xterm/xterm.css"
     config.assets.precompile << "lib/ace.js"
-    config.assets.precompile << "u2f.js"
     config.assets.precompile << "vendor/assets/fonts/*"
 
     # Version of your assets, change this if you want to expire all your assets

config/webpack.config.js

@@ -40,6 +40,7 @@ var config = {
     protected_branches:   './protected_branches/protected_branches_bundle.js',
     snippet:              './snippet/snippet_bundle.js',
     terminal:             './terminal/terminal_bundle.js',
+    u2f:                  ['vendor/u2f'],
     users:                './users/users_bundle.js',
     vue_pipelines:        './vue_pipelines_index/index.js',
   },