If you haven't deleted the Virtual Machine Package as well as removing VMware Fusion this can happen because the Unity Helper Apps still reside within the Virtual Machine Package in the Applications folder or there is just stale information in OS X's Launch Services Registration Database. So if you no longer need the Virtual Machine then delete it or if you do want to keep the Virtual Machine you'll need to delete the Applications folder that resides within the Virtual Machine Package then issue the following command in a Terminal (/Applications/Utilities).
Copy and paste, as is, and then press Enter:
LSR="`mdfind lsregister | grep lsregister`"; "$LSR" -kill -r -domain local -domain system -domain user
This will clear the stale entries from OS X's Launch Services Registration Database.