I came across many computers in which after connecting the pen drive I found that there was no safely remove icon and thus I came across no option to safely remove my drive.
Although the USB drive does not require safely removal but it is always better to use this option. So if it is also the case with your system then here are the steps to remove the drive even if the safely remove icon is missing.
1. Even if there is no icon then you can still access the Safely Remove Hardware dialog box by typing the following command in the Run box.
rundll32 shell32.dll,Control_RunDLL hotplug.dll
Now you can easily stop the device and pull it out.
2. The other way to eject the drive is to use a tool called USB Disk Ejector.
The tool is able to eject any USB device easily and in a click.