Fix chromedriver on CI

Gemfile

@@ -120,7 +120,6 @@ gem 'rack-mini-profiler'
 
 group :test do
   gem 'capybara'
-  gem "chromedriver-helper"
   gem 'launchy'
   gem 'factory_bot'
   gem 'database_cleaner'

Gemfile.lock

@@ -95,8 +95,6 @@ GEM
     aes_key_wrap (1.0.1)
     apipie-rails (0.5.7)
       rails (>= 4.1)
-    archive-zip (0.11.0)
-      io-like (~> 0.3.0)
     arel (9.0.0)
     ast (2.4.0)
     attr_required (1.0.1)
@@ -140,9 +138,6 @@ GEM
     chartkick (2.3.4)
     childprocess (0.8.0)
       ffi (~> 1.0, >= 1.0.11)
-    chromedriver-helper (1.2.0)
-      archive-zip (~> 0.10)
-      nokogiri (~> 1.8)
     chunky_png (1.3.10)
     clamav-client (3.1.0)
     coderay (1.1.2)
@@ -415,7 +410,6 @@ GEM
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     inflecto (0.0.2)
-    io-like (0.3.0)
     ipaddress (0.8.3)
     jquery-rails (4.3.1)
       rails-dom-testing (>= 1, < 3)
@@ -796,7 +790,6 @@ DEPENDENCIES
   carrierwave
   carrierwave-i18n
   chartkick
-  chromedriver-helper
   chunky_png
   clamav-client
   copy_carrierwave_file