Removing REALVnc 5.2.1 from my Macbook

Hello

I have tried to completely remove REALVnc 5.2.1, from my macbook mavericks OS X 10.9.5

1) Un installed VNC Server

2) Un installed VNC Viewer

I then checked to make sure that this had actually happened in that I tried to VNC into my macbook from another machine but then strangely I got a login prompt

to login to the macbook, jpg below

When you remove anything from a Windows OS environment you can actually edit the registry to remove any remnants of the programme you are trying to completely remove, but with Apple OS I have no idea how to do this.

The macbook actually thinks that the server is still running , when I try the password I know to be correct I get the message "Authentication failure" which imply s I have entered the wrong password, but my point is the login prompt should not appear at all from any machine I use to VNC into the macbook as I have removed all trace of VNC ? ( well I think I have )

What am I missing here ?

Thanks