Remove proxied property from Vercel domain configuration files

domains/_vercel.mzaman.json

@@ -5,6 +5,5 @@
   },
   "records": {
     "TXT": "vc-domain-verify=mzaman.is-a.dev,077b1189407060cb67b0"
-  },
-  "proxied": true
+  }
 }

domains/_vercel.www.mzaman.json

@@ -5,6 +5,5 @@
   },
   "records": {
     "TXT": "vc-domain-verify=www.mzaman.is-a.dev,8e506d0c2f036f07acfd"
-  },
-  "proxied": true
+  }
 }