Remove direct Microsoft.NETCore.Platforms dependency.

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

aspnet/Coherence-Signed#344

samples/HelloWorld/project.json

@@ -3,7 +3,6 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.Net.Http.Server": "0.1.0-*",
     "Microsoft.Net.WebSockets.Server": "0.1.0-*"
   },

samples/HotAddSample/project.json

@@ -1,7 +1,6 @@
 {
   "version": "1.0.0-*",
   "dependencies": {
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.AspNetCore.Server.WebListener": "0.1.0-*",
     "Microsoft.Extensions.Logging.Console": "1.0.0-*"
   },

samples/SelfHostServer/project.json

@@ -1,6 +1,5 @@
 {
   "dependencies": {
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.AspNetCore.Server.WebListener": "0.1.0-*",
     "Microsoft.Extensions.Logging.Console": "1.0.0-*"
   },

test/Microsoft.AspNetCore.Server.WebListener.FunctionalTests/project.json

@@ -2,7 +2,6 @@
   "testRunner": "xunit",
   "dependencies": {
     "dotnet-test-xunit": "1.0.0-*",
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.AspNetCore.Server.WebListener": "0.1.0-*",
     "Microsoft.AspNetCore.Testing": "1.0.0-*",
     "xunit": "2.1.0"

test/Microsoft.Net.Http.Server.FunctionalTests/project.json

@@ -2,7 +2,6 @@
   "testRunner": "xunit",
   "dependencies": {
     "dotnet-test-xunit": "1.0.0-*",
-    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Microsoft.Net.Http.Server": "0.1.0-*",
     "Microsoft.Net.WebSockets.Server": "0.1.0-*",
     "Microsoft.AspNetCore.Testing": "1.0.0-*",