Remove duplicate community health files from this repo (#291)

* The files can be found in the default repository for community files: https://github.com/eiffel-community/.github

 * Part of: eiffel-community/community#13

Author: henning-roos

.github/ISSUE_TEMPLATE.md

@@ -44,7 +44,7 @@ check the [Compatibility](https://github.com/eiffel-community/eiffel-intelligenc
 ## About this repository
 The contents of this repository are licensed under the [Apache License 2.0](./LICENSE).
 
-To get involved, please see [Code of Conduct](./CODE_OF_CONDUCT.md) and [contribution guidelines](./CONTRIBUTING.md).
+To get involved, please see [Code of Conduct](https://github.com/eiffel-community/.github/blob/master/CODE_OF_CONDUCT.md) and [contribution guidelines](https://github.com/eiffel-community/.github/blob/master/CONTRIBUTING.md).
 
 ## About Eiffel
 This repository forms part of the Eiffel Community. Eiffel is a protocol for