keir.is-a.dev: point to GitHub Pages, drop email records

domains/keir.json

@@ -1,18 +1,9 @@
 {
-  "owner": {
-    "username": "keirsalterego",
-    "email": "keirsalterego@gmail.com"
-  },
-  "proxied": true,
-  "records": {
-    "CNAME": "keir.vercel.app",
-    "MX": [
-      "mx1.forwardemail.net",
-      "mx2.forwardemail.net"
-    ],
-    "TXT": [
-      "v=spf1 a mx include:spf.forwardemail.net ~all",
-      "forward-email=manish:keirsalterego@gmail.com"
-    ]
-  }
+    "owner": {
+        "username": "keirsalterego",
+        "email": "keirsalterego@gmail.com"
+    },
+    "records": {
+        "CNAME": "keirsalterego.github.io"
+    }
 }