remove unnecessary comma in project.json
remove unnecessary comma in project.json

hackathonvixion/ApplicationInsights-aspnet5,Microsoft/ApplicationInsights-aspnetcore,Microsoft/ApplicationInsights-aspnetcore,hackathonvixion/ApplicationInsights-aspnet5,Microsoft/ApplicationInsights-aspnet5,gzepeda/ApplicationInsights-aspnetcore,Microsoft/ApplicationInsights-aspnet5,Microsoft/ApplicationInsights-aspnet5,gzepeda/ApplicationInsights-aspnetcore,hackathonvixion/ApplicationInsights-aspnet5,Microsoft/ApplicationInsights-aspnetcore,gzepeda/ApplicationInsights-aspnetcore