Merge pull request opencontainers#47 from wking/contributing-no-docs-readme

CONTRIBUTING: Remove docs/README.md reference

Author: caniszczyk

CONTRIBUTING.md

@@ -60,8 +60,7 @@ before submitting a pull request.
 
 Update the documentation when creating or modifying features. Test
 your documentation changes for clarity, concision, and correctness, as
-well as a clean documentation build. See ``docs/README.md`` for more
-information on building the docs and how docs get released.
+well as a clean documentation build.
 
 Pull requests descriptions should be as clear as possible and include a
 reference to all the issues that they address.