TurtleDefaultBakeLayer problem resolved

If you are using Maya 2014, 2015 or 2016 you might have seen this object in your scene TurtleDefaultBakeLayer, which you didn`t create. Maya was generating this automaticly since they acquired Turtle Renderer.
This was quite annoying. So now Autodesk has fixed this problem, if you download Maya 2016 Service Pack 5:
https://knowledge.autodesk.com/support/maya/downloads/caas/downloads/content/maya-2016-service-pack-5.html?v=2016

Once you install SP5, Turtle plugin is not set to Loaded by default, unless you switch it to Autoload. This is how it should be.

If you cannot use Maya 2016 SP5, then you can use this python script for unlocking this node and deleting it:
import maya.cmds as mc
mc.lockNode('TurtleDefaultBakeLayer',l=0)
mc.delete('TurtleDefaultBakeLayer')

More about Turtle Renderer for Maya here:
https://knowledge.autodesk.com/support/maya/getting-started/caas/CloudHelp/cloudhelp/ENU/123112/files/turtle-html.html