Per recommendation from Robert, drop these

This may fix the duplicate issues we're seeing.

Author: cgwalters

renovate-config.js

@@ -1,8 +1,6 @@
 module.exports = {
   autodiscover: true,
   branchPrefix: 'test-renovate/',
-  username: 'renovate-release',
-  gitAuthor: 'Renovate Bot <[email protected]>',
   platform: 'github',
   forkProcessing: 'enabled',
   packageRules: [