fix typo in contributing file

CONTRIBUTING.md

@@ -10,12 +10,6 @@ If you've noticed a bug or have a feature request, make sure to check our [Issue
 
 If this is something you think you can fix, then [fork Yusr](https://help.github.com/articles/fork-a-repo) and create a branch with a descriptive name.
 
-A good branch name would be (where issue #325 is the ticket you're working on):
-
-```
-git checkout -b 325-add-japanese-localization
-```
-
 ## Get the test suite running
 
 Make sure you're using the latest version of PHP and have Composer installed. Then, install the dependencies: