Merge pull request #2 from dingyin/master

Delete unused fixture file and update CONTRIBUTING.md

Author: Yin Ding

CONTRIBUTING.md

@@ -67,7 +67,8 @@ Please do not ever hesitate to ask a question or send a pull request.
 
 This is a rough outline of what a contributor's workflow looks like:
 
-- Create a topic branch from where to base the contribution. This is usually master.
+- Fork [Arktos](https://github.com/futurewei-cloud/arktos).
+- Create a topic branch in your forked repo from where to base the contribution. This is usually master.
 - Make commits of logical units.
 - Make sure commit messages are in the proper format (see below).
 - Push changes in a topic branch to a personal fork of the repository.