Fix Issue 1190 (dotnet#1310)

* Remove extra node for .NETCore.App

Fixes a build issues.

* update topic to match code.

* Add a note that this is 1.0

This topic is written for .NET Core 1.0. The opening note makes that
clear.

Author: BillWagner

docs/core/testing/unit-testing-with-dotnet-test.md

@@ -17,6 +17,9 @@ By [Steve Smith](http://ardalis.com) and [Bill Wagner](https://github.com/BillWa
 
 [View or download sample code](https://github.com/dotnet/docs/tree/master/samples/core/getting-started/unit-testing-using-dotnet-test)
 
+> [!NOTE]
+> This topic applies to .NET Core 1.0.
+
 ## Creating the Projects
 
 [Writing Libraries with Cross Platform Tools](../tutorials/libraries.md)
@@ -114,10 +117,6 @@ package as another dependency to the project:
 
 ```json
 "dependencies": {
-  "Microsoft.NETCore.App": {
-    "type":"platform",
-    "version": "1.0.0"
-  },
   "xunit":"2.1.0",
   "dotnet-test-xunit": "1.0.0-rc2-192208-24",
   "PrimeService": {

samples/core/getting-started/unit-testing-using-dotnet-test/test/PrimeService.Tests/project.json

@@ -3,10 +3,6 @@
   "testRunner": "xunit",
 
   "dependencies": {
-    "Microsoft.NETCore.App": {
-      "type":"platform",
-      "version": "1.0.0"
-    },
     "xunit":"2.1.0",
     "dotnet-test-xunit": "1.0.0-rc2-192208-24",
     "PrimeService": {