[eslint config] Remove rules/strict from 'extends'

Since the file is now imported in base instead.

Fixes airbnb#1582.

Author: edmorley

packages/eslint-config-airbnb/index.js

@@ -1,7 +1,6 @@
 module.exports = {
   extends: [
     'eslint-config-airbnb-base',
-    'eslint-config-airbnb-base/rules/strict',
     './rules/react',
     './rules/react-a11y',
   ].map(require.resolve),