Disabling warning dock messages



I installed the 10.0.3 build of macOSX. Before to install the 10.0.3 (I had the 10.0.1 before), I added a dock extra for managing sound volume.
Now, at every login, the next message appear :

"This dock extra may not be compatible with their version of MacOS X you are running. If it does not function correctly, please contact the developpers do not contact Apple"

Does someone know how to disable it ?

Thank you for any suggestion.