Removed nuget.config to prevent build errors in CI when referencing Microsoft's Nuget feed

Author: dkattan

NuGet.Config

@@ -2,15 +2,6 @@
   "version": 1,
   "dependencies": {
     ".NETFramework,Version=v4.6.2": {
-      "Microsoft.NETFramework.ReferenceAssemblies": {
-        "type": "Direct",
-        "requested": "[1.0.3, )",
-        "resolved": "1.0.3",
-        "contentHash": "vUc9Npcs14QsyOD01tnv/m8sQUnGTGOw1BCmKcv77LBJY7OxhJ+zJF7UD/sCL3lYNFuqmQEVlkfS4Quif6FyYg==",
-        "dependencies": {
-          "Microsoft.NETFramework.ReferenceAssemblies.net462": "1.0.3"
-        }
-      },
       "NETStandard.Library": {
         "type": "Direct",
         "requested": "[2.0.3, )",
@@ -175,11 +166,6 @@
         "resolved": "1.1.0",
         "contentHash": "kz0PEW2lhqygehI/d6XsPCQzD7ff7gUJaVGPVETX611eadGsA3A877GdSlU0LRVMCTH/+P3o2iDTak+S08V2+A=="
       },
-      "Microsoft.NETFramework.ReferenceAssemblies.net462": {
-        "type": "Transitive",
-        "resolved": "1.0.3",
-        "contentHash": "IzAV30z22ESCeQfxP29oVf4qEo8fBGXLXSU6oacv/9Iqe6PzgHDKCaWfwMBak7bSJQM0F5boXWoZS+kChztRIQ=="
-      },
       "Microsoft.VisualStudio.Threading": {
         "type": "Transitive",
         "resolved": "17.6.40",