I had this same issue today. I don't have Java installed, but it seems as if the Java updater requires Java to run. 🙄 The console showed the following error:
launchctl[20885]: launchctl: Couldn't stat("/Library/LaunchAgents/com.oracle.java.Java-Updater.plist"): No such file or directory
I'm guessing the uninstall didn't complete correctly. I manually uninstalled everything via the Terminal and the prompts and console messages went away.