Drop actionview dependency because it is not really used

Author: etagwerker

next_rails.gemspec

@@ -29,5 +29,4 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency "simplecov", "~> 0.17.1"
   spec.add_development_dependency "timecop", "~> 0.9.1"
-  spec.add_development_dependency "actionview", "< 6.0"
 end