Merge branch 'remove-unpullable-project' into 'master'

Remove project which can't be pulled while seeding

This project can't be pulled from GH when running `SIZE=20 rake dev:setup`

[ci skip]

See merge request !5559

db/fixtures/development/04_project.rb

@@ -20,7 +20,6 @@ Sidekiq::Testing.inline! do
       'https://github.com/airbnb/javascript.git',
       'https://github.com/tessalt/echo-chamber-js.git',
       'https://github.com/atom/atom.git',
-      'https://github.com/ipselon/react-ui-builder.git',
       'https://github.com/mattermost/platform.git',
       'https://github.com/purifycss/purifycss.git',
       'https://github.com/facebook/nuclide.git',