Minor fix.

src/Volo.ExtensionMethods/Check.cs

@@ -4,6 +4,8 @@ using JetBrains.Annotations;
 
 namespace Volo
 {
+    //TODO: This code should not be here and this library should not depend on JetBrains.Annotations.
+
     [DebuggerStepThrough]
     public static class Check
     {

src/Volo.ExtensionMethods/project.json

@@ -1,9 +1,9 @@
-{
+{
   "version": "1.0.0-*",
 
   "dependencies": {
-    "NETStandard.Library": "1.6.1",
+    "JetBrains.Annotations": "10.2.1",
-    "Volo.CodeAnnotations": "1.0.0-*"
+    "NETStandard.Library": "1.6.1"
   },
 
   "frameworks": {