I followed your steps and can recreate the problem. The issue is related, but there is a different way to fixing it, as you really don't want the callback function anymore. The resize callback gets added as the SizeChangedFcn in the property inspector. So even after changing the gui resize option and deleting the function from your code, there is still a handle to the resize callback function listed in the properties of the figure window.
To fix it, rt click on the figure and select "Property Inspector"
Scroll down until you see the SizeChangedFcn property. On the right you will see an anonymous function handle that looks something like this:
Delete everything to the right of SizeChangedFcn.
Close the property inspector and save the Figure file.
Run your code to verify the error has gone away.
