Removing old packages

Packages/packages-lock.json

       "source": "embedded",
       "dependencies": {
         "com.unity.nuget.newtonsoft-json": "2.0.0",
-        "com.unity.services.core": "1.1.0-pre.2",
+        "com.unity.services.core": "1.1.0-pre.4",
         "com.unity.modules.unitywebrequest": "1.0.0"
       }
     },
       "source": "embedded",
       "dependencies": {
-        "com.unity.modules.unitywebrequest": "1.0.0",
-        "com.unity.nuget.newtonsoft-json": "2.0.0"
+        "com.unity.modules.unitywebrequest": "1.0.0"
       }
     },
     "com.unity.services.lobby": {