rollback appsettings.json

Signed-off-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Web.UI.NetCore/appsettings.json

@@ -1,6 +1,6 @@
 {
   "ConnectionStrings": {
-    "umbracoDbDSN": "Server=(LocalDB)\\Umbraco;Database=NetCore;Integrated Security=true"
+    "umbracoDbDSN": ""
   },
   "Serilog": {
     "MinimumLevel": {
@@ -71,4 +71,4 @@
       }
     }
   }
-}
+}