Here is how you remove VMWare Fusion as referenced here from VMWare: Manually uninstalling VMware Fusion
In Fusion 4.x, there is no uninstaller. Most Fusion files are contained within the application bundle (that is, the Fusion application in /Applications). To uninstall Fusion 4.x, drag the application bundle from the Applications folder to the Trash.
Also, ensure to delete these additional files and folders if they are present.
Note: Depending on the environment, some of these files may not be present. Some files may exist only if Fusion 3 was originally installed on the machine that was later upgraded to Fusion 4.
/Library/Application Support/VMware Fusion
~/Library/Application\ Support/VMware\ Fusion
Note: In Lion, the Library folder inside your user directory is hidden by default. To access your Library folder:
Click the Finder icon.
While holding the Option key, click the Go menu. This reveals your Library folder.