Revert cleanup

Author: danreeves

docs/rules/no-unstable-nested-components.md

@@ -124,6 +124,7 @@ function Component() {
   "off" | "warn" | "error",
   {
     "allowAsProps": true | false,
+    "customValidators": [] /* optional array of validators used for propTypes validation */
     "propNamePattern": string
   }
 ]

lib/rules/no-unstable-nested-components.js

@@ -272,6 +272,12 @@ module.exports = {
     schema: [{
       type: 'object',
       properties: {
+        customValidators: {
+          type: 'array',
+          items: {
+            type: 'string',
+          },
+        },
         allowAsProps: {
           type: 'boolean',
         },