How can I delete VMWare from my MacBook Air?
Here is how you remove VMWare Fusion as referenced here from VMWare: Manually uninstalling VMware Fusion


  Fusion 4.x
  
  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
  /Users/Library/Preferences/VMware Fusion
  /Library/Preferences/VMware\ Fusion
  ~/Library/Caches/com.vmware.fusion
  ~/Library/Application\ Support/VMware\ Fusion
  ~/Library/Preferences/com.vmware.fusion.LSSharedFileList.plist
  ~/Library/Preferences/com.vmware.fusion.LSSharedFileList.plist.lockfile
  ~/Library/Preferences/com.vmware.fusion.plist
  ~/Library/Preferences/com.vmware.fusion.plist.lockfile
  ~/Library/Preferences/com.vmware.fusionDaemon.plist
  ~/Library/Preferences/com.vmware.fusionDaemon.plist.lockfile
  
  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.