Remove infinite redirect (#594)

Author: Paul-Cornell

docs.json

@@ -672,10 +672,6 @@
       "source": "/api-reference/legacy/free-api",
       "destination": "/api-reference/overview"
     },
-    {
-      "source": "/api-reference/troubleshooting/api-key-url",
-      "destination": "/api-reference/troubleshooting/api-key-url"
-    },
     {
       "source": "/glossary/glossary",
       "destination": "/welcome"