Gemfile.rails51 in by_star-4.0.0

- old
+ new

@@ -2,9 +2,6 @@
 
 gemspec path: '../../'
 
 gem 'activerecord', '~> 5.1.0'
 gem 'pg',           '~> 0.18'
-gem 'mongoid',      '~> 6.0'
-# Due to weird connection issues in 2.5.0
-# TODO: double check this for non 2.5.0 versions
-gem 'mongo', '~> 2.4.3'
+gem 'mongoid'