Remove myself as the default assignee

Author: AndrewLeedham

renovate.json

@@ -2,7 +2,6 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "dependencyDashboard": true,
   "labels": ["change: dependencies", "release: skip"],
-  "assignees": ["AndrewLeedham"],
   "schedule": ["after 9am on Wednesday"],
   "timezone": "Europe/London",
   "extends": [