domains: take down oil.is-a.dev

Signed-off-by: orangc <c@orangc.net>

domains/oil.json

@@ -1,10 +0,0 @@
-{
-  "description": "Portfolio site github pages",
-  "owner": {
-    "username": "oilindia",
-    "email": "oil.india.mail@gmail.com"
-  },
-  "records": {
-    "CNAME": "oilindia.github.io"
-  }
-}