Removed references to Travis CI in CONTRIBUTING.md (#2554)

CONTRIBUTING.md

@@ -80,7 +80,7 @@ During the discussion, you may be asked to make some changes to your pull reques
 
 If so, add more commits to your branch and push them – they will automatically go into the existing pull request. But don't forget to squash them.
 
-Opening a pull request will trigger a Travis CI build to check the validity of all links in the project. After the build completes, **please ensure that the build has passed**. If the build did not pass, please view the Travis CI log and correct any errors that were found in your contribution. 
+Opening a pull request will trigger a build to check the validity of all links in the project. After the build completes, **please ensure that the build has passed**. If the build did not pass, please view the build logs and correct any errors that were found in your contribution. 
 
 *Thanks for being a part of this project, and we look forward to hearing from you soon!*