Update the CONTRIBUTING.md to refer to the main AM contributing, facilitating maintenance work (#36)

* since no info specific to fixity is in the CONTRIBUTING file, we can send the reader to the original version

* removing CONTRIBUTING because it is not currently needed

Author: eviau-artefactual

.pre-commit-config.yaml

@@ -35,5 +35,5 @@ repos:
   - id: doctoc
     files: |
       (?x)^(
-        (CONTRIBUTING|README)\.md
+        (README)\.md
       )