Most virtual machine devices can be removed from the virtual machine configuration (except for the main memory, CPU, and video memory).
Note: You can disable any device, except for the memory, without removing it from the virtual machine configuration. To this effect, clear the Enabled option on the corresponding device's pane in Virtual Machine Configuration.
To remove a device
Note: If you accidentally click the Remove button , click Cancel in Virtual Machine Configuration. Once you click OK , the device will be removed.