deprecate check-docstring-first without replacement

this hook has unfixable false positives and is not that useful

perhaps someone can write a flake8 plugin to replace the functionality

Author: asottile

.pre-commit-hooks.yaml

@@ -29,7 +29,7 @@
     entry: check-case-conflict
     language: python
 -   id: check-docstring-first
-    name: check docstring is first
+    name: check docstring is first (deprecated)
     description: checks a common error of defining a docstring after code.
     entry: check-docstring-first
     language: python