README.md in timber-3.0.0

- old
+ new

@@ -4,16 +4,10 @@
 
 ```shell
 bundle install
 ```
 
-Be sure to install specific Gemfile dependencies:
-
-```
-BUNDLE_GEMFILE=gemfiles/rails-4.2.gemfile bundle install
-```
-
 You can run tests like this:
 
 ```shell
-BUNDLE_GEMFILE=gemfiles/rails-4.2.gemfile bundle exec rspec
-```
\ No newline at end of file
+bundle exec rspec
+```