remove miku.json since i no longer use it

domains/miku.json

@@ -1,12 +0,0 @@
-{
-  "owner": {
-    "username": "dragsbruh",
-    "email": "dragsbruh@protonmail.com",
-    "discord": "781445370177126401",
-    "bluesky": "furina.is-a.dev"
-  },
-  "description": "a redirect to my homelab",
-  "records": {
-    "URL": "https://vinster.xyz/"
-  }
-}