Move "Font Loading Checklist" into frontend

It probably has more to do with front-end dev than design.

resources/design.json

@@ -176,12 +176,6 @@
       "url": "https://fonts.google.com/",
       "tags": ["typography", "collection"]
     },
-    {
-      "title": "The Font Loading Checklist",
-      "desc": "Four important considerations when loading web fonts.",
-      "url": "https://www.zachleat.com/web/font-checklist/",
-      "tags": ["typography", "tips", "best practices"]
-    },
     {
       "title": "Practical Typography",
       "desc": "A just-deep-enough dive into typography for designers.",