[eslint config] [patch] set react/no-unused-prop-types to “warn”, pending bugfixes.

Closes #1099.

packages/eslint-config-airbnb/rules/react.js

@@ -271,10 +271,10 @@ module.exports = {
 
     // Prevent unused propType definitions
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-unused-prop-types.md
-    'react/no-unused-prop-types': ['error', {
+    'react/no-unused-prop-types': ['warn', {
       customValidators: [
       ],
-      skipShapeProps: false,
+      skipShapeProps: true,
     }],
 
     // Require style prop value be an object or var