Remove dependency of "coffee-rails" gem

Author: workgena

README.md

@@ -29,7 +29,7 @@ And then execute:
 $ bundle
 ```
 
-Add the following line at the end of "app/assets/javascript/active_admin.js.coffee":
+Add the following line at the end of "app/assets/javascript/active_admin.js":
 
 ```javascript
 //= require active_admin_scoped_collection_actions

active_admin_scoped_collection_actions.gemspec

@@ -17,6 +17,5 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "coffee-rails"
   spec.add_dependency "activeadmin", ">= 1.1", "< 3.a"
 end