fix: remove useless required line in index (#84)

* remove useless required line

* update markdownlint config

The only rule we are interested in is the no-relative-import rule

Author: EveJulliard

.markdownlint.json

@@ -1,4 +1,4 @@
 {
-  "default": true,
-  "MD013": false
+  "default": false,
+  "MDC01": true
 }

packages/eslint-plugin/lib/index.js

@@ -4,5 +4,4 @@ const requireIndex = require("requireindex");
 
 module.exports = {
   configs: requireIndex(__dirname + "/configs"),
-  rules: requireIndex(__dirname + "/rules"),
 };