Fix OnUserDelete

src/Action/Implementations/User/SPGroupAction.cs

-using Coscine.Action.EventArgs;
+using Coscine.Action.EventArgs;
 using Coscine.Api.LegacySharePoint.Models;
 
 namespace Coscine.Action.Implementations.User
@@ -25,7 +25,6 @@ namespace Coscine.Action.Implementations.User
         {
             SharePointEventObject sharePointEventObject = new SharePointEventObject
             {
-                Role = userEventArgs.Role.DisplayName,
                 UserId = userEventArgs.User.Id.ToString(),
                 ProjectDescription = userEventArgs.Project.Description,
                 ProjectDisplayName = userEventArgs.Project.DisplayName,