Revert "Added Xenon doi as reference to .zenodo.json"

This reverts commit ae7ea59.

related_identifiers field will override automaticly generated reference to github release. So undo it

.zenodo.json

@@ -1,12 +1,4 @@
 {
   "license": "Apache-2.0",
-  "title": "Xenon command line interface",
-  "access_right": "open",
-  "related_identifiers": [
-    {
-      "scheme": "doi",
-      "identifier": "10.5281/zenodo.597993",
-      "relation": "isReferencedBy"
-    }
-  ]
+  "title": "Xenon command line interface"
 }

README.md

@@ -70,7 +70,8 @@ The unit and integration tests can be run with:
 3. Create a new GitHub release
 4. Upload the files in `build/distributions/` directory to that release
 5. Publish release
-6. Create conda release, see [conda/README.md](conda/README.md)
+6. Edit [Zenodo entry](https://doi.org/10.5281/zenodo.597603), add [Xenon doi](https://doi.org/10.5281/zenodo.597993) as `is referenced by this upload`.
+7. Create conda release, see [conda/README.md](conda/README.md)
 
 ## Docker