Remove unused gems

Gemfile

@@ -28,8 +28,6 @@ gem 'dotenv-rails', require: 'dotenv/rails-now' # dotenv should always be loaded
 gem 'flipper'
 gem 'flipper-active_record'
 gem 'flipper-ui'
-gem 'fog-openstack'
-gem 'font-awesome-rails'
 gem 'geocoder'
 gem 'gon'
 gem 'graphiql-rails'
@@ -47,7 +45,6 @@ gem 'mailjet'
 gem 'omniauth-github'
 gem 'omniauth-rails_csrf_protection', '~> 0.1'
 gem 'openid_connect'
-gem 'openstack'
 gem 'pg'
 gem 'phonelib'
 gem 'prawn-rails' # PDF Generation
@@ -64,7 +61,6 @@ gem 'react-rails'
 gem 'rgeo-geojson'
 gem 'sanitize-url'
 gem 'sassc-rails' # Use SCSS for stylesheets
-gem 'scenic'
 gem 'sentry-raven'
 gem 'skylight'
 gem 'smart_listing'