DrvrRemove
DrvrRemove Remove a driver
short refNum ; driver RefNum (-1 through -64)
returns Error Code; 0=no error
DrvrRemove is used to remove a driver. A RAM-based driver is purged
from the system heap (using ReleaseResource) and memory for the DCE is
disposed.
refNum driver RefNum (-1 through -64)
Returns: an operating system Error Code.

Notes: Inline Glue for this routine is given below:
pascal OSErr DrvrRemove( short refNum)
= {0x301F,0xA03E,0x3E80};