When you install any Google software on your Mac, it silently installs a software updater which will update the software without your intervention. To delete this, use the following command line in a terminal window. Make sure its all on one line. For the newbies, do not include the dollar sign. It’s there to show you’re in a terminal session.
$ sudo /Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents /Resources/GoogleSoftwareUpdateAgent.app/Contents/Resources/install.py --uninstall
This only works if you uninstall all Google because when an applications is updated, it reinstalls the updater. To permanently disable the updater, follow the instructions in the twentyways.com link below.
Found at Google Support.
Thanks to www.twentyways.com.