Removing unused references

src/Microsoft.VisualStudio.Web.BrowserLink.Loader/Project.json

@@ -1,21 +1,18 @@
 {
   "version": "14.0.0-*",
+  "compilationOptions": {
+    "warningsAsErrors": true
+  },
   "dependencies": {
     "Microsoft.AspNet.FileProviders.Physical": "1.0.0-*",
     "Microsoft.AspNet.Http.Abstractions": "1.0.0-*",
-        "Microsoft.AspNet.PageExecutionInstrumentation.Interfaces" : "1.0.0-*",
     "Microsoft.Extensions.PlatformAbstractions": "1.0.0-*"
   },
   "frameworks": {
     "dnx451": { },
     "dnxcore50": {
       "dependencies": {
-                "Microsoft.Win32.Registry": "4.0.0-*",
+        "Microsoft.Win32.Registry": "4.0.0-*"
-                "System.Collections": "4.0.10-*",
-                "System.Net.Sockets": "4.0.10-*",
-                "System.Reflection.Extensions": "4.0.0-*",
-                "System.Runtime.InteropServices": "4.0.20-*",
-                "System.Threading": "4.0.10-*"
       }
     }
   }