I recently had to keep retesting an installer, part of it's actions were to install a print driver, but to be able to keep testing, I had to remove the driver from the computer, not just the printer. So, here's how it's done, in case someone else needs to do this.

1. Find your driver name. (ex.“Brother MFC-J6520DW Printer”)
2. In "Devices and Printers" remove all printers using the driver from step 1
3. Open Regedit.
4. Navigate to (on 32 bit(x86) computers) “HKEYLOCALMACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows NT x86\Drivers\Version-3”
5. Or (on 64 bit(x64) computers) “HKEYLOCALMACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows x64\Drivers\Version-3”
6. And then remove the folder that matches the printer driver name.
7. Open Services, and restart the print spooler service

That's it.