Remove direct Microsoft.NETCore.Platforms dependency.

- Microsoft.NETCore.App now pulls this package in.

aspnet/Coherence-Signed#344

Author: N. Taylor Mullen

samples/SampleApp/project.json

@@ -3,7 +3,6 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0-*",
     "Microsoft.Extensions.Configuration.Json": "1.0.0-*",
     "Microsoft.Extensions.FileProviders.Physical": "1.0.0-*",

test/Microsoft.Extensions.Logging.Test/project.json

@@ -4,7 +4,6 @@
   },
   "dependencies": {
     "dotnet-test-xunit": "1.0.0-*",
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.AspNetCore.Testing": "1.0.0-*",
     "Microsoft.Extensions.DependencyInjection": "1.0.0-*",
     "Microsoft.Extensions.Logging": "1.0.0-*",

test/Microsoft.Extensions.Logging.Testing.Tests/project.json

@@ -5,7 +5,6 @@
   },
   "dependencies": {
     "dotnet-test-xunit": "1.0.0-*",
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.Extensions.Logging.Testing": "1.0.0-*",
     "xunit": "2.1.0"
   },