How to remove your Photo from Youtube
Go to:
Next:
This will simply revert your Youtube account back to the way it should be. It should remove the Google+ photo as well as other information.
Go to:
http://www.youtube.com/account_advanced
Next:
Click on Rename > Check "I understand that my channel will be renamed." > Click Rename Channel
This will simply revert your Youtube account back to the way it should be. It should remove the Google+ photo as well as other information.